Sasuke's character was aimed at edgelords... and boy is this world overflowing with them.
This the truth. The most common gripe about Lawd Naruto is that he and basically all other shounen MC's are similar. I could write a dissertation on how it's false, but what really gets me is the irony.
But Sasuke's character is the single most tired trope ever. In every story ever, there's some edgelord, "2 kewl 4 skool" toolbag with a bad attitude and 'ladies man' attributes. I honestly think the die-hard fans of Sasuke are the type of kids that have seen the inside of too many lockers IRL and live vicariously through him.
Look at Kakashi. He's had a *worse* past, Rikudou MS Kakashi is just as strong (if not stronger) than Sasuke, he's got better outfits, but his fanbase is way more chill and laid back because Kakashi isn't an edgelord d-bag. There's some connection here, Harvard needs to investigate it.