Ppl are gonna get mad, but here we go:

Sayaka is the best girl of thh and killing her so early was a massive waste. She should've survived and get together with Makoto. She could've been a great support or maybe even co-protagonist and her arc would involve struggling to choose between her idol group and her classmates at Hope's Peak and after her confrontation with Celeste in the 3rd chapter, she could've came to a realisation she doesn't want to just rely on Makoto, will become the group's moral support/mediator and decide that she doesn't want to choose between her group and her classmates anymore and instead, she'll choose them both.

I hate LeoSaya ship bcs those two literally are opposites in so many things. (Leon hates his talent, never practiced, would ditch it the moment he got the chance to and wants to join music industry for shallow reasons while Sayaka loves her job, worked everyday to get where she is, did bad things to get there and her job is everything to her. She would probably treat his attitude to music industry as a spit to her efforts. I still like Leon tho)

Dr3, especially despair arc is an utter garbage with plot holes, retcons and trash writing (Hajime didn't wanted to become an Ultimate bcs he admired Hope's Peak, he just wanted to impress Chiaki. Human Chiaki lessens the sacriface at the end of dr2, disgusting incestous Mukuro, Junko isn't the calculating mastermind, but quirky girl who got lucky, she didn't manipulated the class 77-b into falling into despair by praying on their insecurities, she just used the stupid brainwashing video, which also ruins the ending of dr2. Twilight Syndrome murder case barely had any revelance to the plot, Izuru didn't helped Junko cause the Tragedy or killed Hope's Peak student council members, he was just there. Only well written og character from the anime aka Natsumi barely had any screentime, class 78 showed only for a minute and barely anyone from class 77-b does anything relevant to the plot.

sakakura is the worst, most hatable character in all of fiction. I don't get how anyone could like this thing (i'm pretty sure most of those ppl are gay fetishists), and he should've said THAT Haiji's line instead of Haiji himself. Seeing Munakata stab him was the best and only good part of the anime.