Personally I the hate is more towards the sharingan rather than the character but he has changed alot becuase of the sharingan so it can either way. Again this not me but the guy makes good points.
1. Why Kakashi having MS isn't a subject of hate is because there was a timeskip where he could had achieve it and also because we don't know much about his past.
Why Sasuke having MS IS a subject of hate is because he didn't learn anything to achieve it since his brother gave it to him thinking that after getting his revenge he'd go back to Konoha as an hero. And for EMS it's because he was in TOTAL contradiction to what he previously said (from "I don't share Itachi's vision" or wtv to "I need to be at my fullest") which is being hypocrite. Add-on: There's no more negative effects on using the BIG-3.
2. Why Itachi>Sasuke isn't a subject of hate is simply because Itachi gained the respect of all the readers at 100%. Also because Madara stated himself that if Itachi was serious, he wouldn't had "almost" killed him many times; the 1st would had been the only one. Finally because he never intended on killing Sasuke, but to push him at his limit to extract Orochimaru from him.
Why Sasuke>Itachi IS a subject of hate is because since the day Sasuke got his MS, Sasuke uses at 90% his own brother's power to win his fights and not his own.
3. Why Naruto's power ups plus his Chakra pool aren't a subject of hate is because we are aware of him getting them through training and they didn't appear while he was fighting like it was completly normal while is Chakra pool was explained in Chapter 1. Besides, Naruto can't control the Kyubi and that's why he doesn't want to rely (negative effects).
Why Sasuke' power ups plus his Chakra pool ARE a subject of hate is because his fights are a newer version of Pokémon battles where you learn new attack moves when leveling up by gaining exp. Unlike Pokémons, Sasuke gain levels without defeating his opponents, but only by surviving. Also, is Chakra pool's explanation which is "hate" is illogical to people who are 16+.
4. Why RasenShuriken isn't a subject of hate is because Naruto completed at 50 & 100% the technique his dad was aiming and he never abused of it since it was used way less ofter then all his other techniques and when a strong attack is used rarely, it has more value.
Why Kirin isn't a subject of hate is because Sasuke was smart enough to use pure Lightning to create that attack and was used once only. Again, when a strong attack is used rarely, it has more value.
Why Mangekyou Sharingan techniques ARE a subject of hate is because the more he uses them, the more it feels like he doesn't deserve them since he lost his eyesight at an extremely fast rate compared to Itachi by abusing of them.
5. Why Naruto in Sage Mode isn't a subject of hate is because he is "The Chosen One" which is logical that people who are destined to be heroes recieve something completly different from everyone else.
Why Sasuke with CS2 isn't a subject of hate is because he used the Sharingan in ways that made it special like seeing the micro bombs that were in his body to shot 'em down with his Lightning element or to gain Lee's Taijutsu abilities. His techniques were varied and he relied on his own abilities the most. He used the CS as Naruto used his Kyubi.
Why Sasuke with MS/EMS IS a subject of hate is stated at point 1. second paragraph.
Finally if you still wonder why Sasuke is hated, I'll try to make it sound more logical using math:
Sasuke + Cursed Seal = Sasuke at his best.
Sasuke - Cursed Seal + MS/EMS = Sasuke failing at being a good fighter.
Face it fangirls and cabinlovers: Sasuke CS2 > Sasuke EMS. If Sasuke wouldn't lose his mind, abuse of his occular powers and act like such a all-mighty hypocrite, he wouldn't be hated.
Itachi had the same powers and is he hated? No.
Nagato had the Rinnegan, the most powerful occular abilities known, and is he hated? No.
Jinchurikis got Bijus and are they hated? No.
Need me to continue with the Gates, Byakugan and more or you finally get it? Can't wait to read your replies to prove me wrong lol...