I want to make something clear in the beginning: I have nothing against Naruto fans. I think you're a little misguided, or simply ignorant of the far wider - and better - selection of anime that's out there. You probably only really watch anime on tv, in which case it's hard to see why Naruto is such a bad show; it's one of the nicest looking animes on tv, after all. The Naruto fangirls can get on my nerves, and I am tired of all of the cosplay for it, but I still have nothing against you.
I just hate the show.
And before anyone says it, I don't hate it for its fandom. I have nothing against a popular anime - I love Fullmetal Alchemist, after all. That show's fans can get on my nerves just as much as the Naruto fans, but I still adore the show. This isn't a jumping-the-gun decision, either; I've watched the show. I've watched an alright portion of the show. I haven't tortured myself by keeping current with it, but I have seen enough to make a commentary on why it's terrible.
One last note before I begin: I have not watched Naruto Shippuuden, so I have nothing to say about that show. This commentary only stands for the first show.
Alright then. I hate Naruto. Here's why.
Let's just talk about the big one right away. We're all thinking it, I'm sure. The number one reason to hate the show Naruto? Naruto. I don't know how anyone thought this little brat would make a good main character. He's a complete and total moron, and annoying to boot. I don't know how you Naruto fans survive his whining. I cringe whenever I hear the two words "Believe it", even out of the Naruto context. The character of Naruto has a very interesting backstory. And I'll admit, the one time I saw that backstory actually have an impact on the present day, I found it very intriguing. But I saw it once in the season and a half of the show that I watched. That's not nearly enough to make up for the rest.
Naruto is completely incompetent. Now, I don't mind a hero that's just starting out, that doesn't know anything about what he's doing; he is supposed to be just starting out. But he insists he's going to be the best when he can't even perform the rudimentary tasks that his peers seem to be able to do easily - which tells me that, despite wanting to be the best, he hasn't done anything to get there. Okay, arrogance is something else I could handle. But on top of being incompetent and arrogant, he's deluded as well. And the show's storyline just helps that along by letting him succeed despite not learning anything. Can I get behind a character that's incompetent, arrogant, deluded, but lucky? No. No, I can't. What about the other ninja trainees that have worked hard their whole childhoods to get to where they are? They'll never be the best because they're not lucky enough? That's retarded.
His delusion makes the love triangle (square?) painful, as well. After the first few episodes, Naruto's demented attempts to woo Sakura while blatantly ignoring the other chick that likes him quickly gets old. It's no longer funny, no matter how rediculous the scenario is set up. I wouldn't mind the Sakura-loves-Sasuke aspect of it if Sakura wasn't such a fangirl. Sakura's character develops in an interesting way down the road, but it's slow in coming; too little too late.
Speaking of Sasuke, let's take a look at him for a moment. Yes, yes, I know, he's emo, enough already. Let's take an actual look at his character. Sasuke seems to be the most competent student in that school. Most of the tasks he's set to, he performs effortlessly. The only times Naruto outshines him are when that dumb luck of his pulls through - or his actual backstory makes an appearance. He may be a little bit arrogant, but he has the skill to back it up. He's determined to reach his goal, and actually puts forth the effort to reach it, unlike someone else. He has a backstory himself, with a connection to other characters in the show. His character actually develops throughout the course of the show. He doesn't have a rediculous catch-phrase. He's not an idiot. Seems to me the show should have been called Sasuke.
Naruto would make a great comic relief supporting character. It's okay to hate a supporting character so long as your main characters make up for it. Yes, I know, the atmosphere of the show would have to change to accomodate that, but I think the show would be far less absurd with a competent main character.
But that's enough about the characters. Why else do I hate the show?
I am sick and tired of shows that take three episodes to show off one match of a fight. We've all had enough of that with Dragonball Z and InuYasha. It isn't a deal breaker in and of itself, mind you - I still have a fondness for DBZ and InuYasha. What's the difference? Dragonball Z was actually funny, and InuYasha actually had character development, a likeable main character (with the Naruto-esque rediculous character as a supporting character), and an exciting plot. It doesn't matter how much you spend to make a show look nice. You need to save some money for writers. And stretching out fights to fill up episode slots just is not acceptable if you don't have other good aspects in the show to make up for it.
Also, looped backgrounds. Everyone uses them now and again. But the trick to using them is to employ them in such a way that your audience doesn't notice. When even the youngest and newest fan can tell that Sasuke's been running through the same three trees for three episodes, we've crashed and burned. It's one thing to re-use a finished scene again and again in episodes to fill up some seconds (such as with the magical girl transformations), but honestly, it gets old very very fast, and it makes even a well-polished animation seem cheap.
This next bit is more of a personal preference. I can't stand having to keep track of the names, backstories, relationships, and psychologies of fifty or more characters. It's okay to have so many villages, but they seem to expect you to remember who each of the four or so characters are that come from each village, plus their teachers, plus all of the other Hidden Leaf village characters, plus the villains. I had enough trouble keeping the class-full of characters in the Battle Royale novel straight, but to double that? It doesn't help that since there's so much filler and the fight scenes are dragged out over episodes, that you don't see most of the characters on a regular basis. It's like you have to start keeping a chart handy, with diagrams of how each character relates to the others. I just can't get into a story that doesn't let you appreciate each of its highlighted characters.
I could probably nit-pick for a while on the little details. Lots of people have done it - why does Naruto wear an orange jumpsuit if he's a ninja? Why isn't the Hidden Leaf village hidden? Etc, etc. But I think I've picked apart the majority of the show's major flaws. There are probable others; there are always others with shows this bad. I thought about wrapping this article up with a bit of what I actually did like about the show, but as I sit here trying to come up with more than two things, I find that they just don't make up for the bad, and just aren't worth mentioning.