Here are just some characters I don't like and why-
Ibuki Mioda: Overrated, wasn't really that great, hated her death, just annoyed me after chapter 2.
Kaito Momota: Bored me, wasn't really that fun, gave off weird vibes, don't like the entire thing with Kokichi but I'm glad he killed him, really only liked him for how he was with Shuichi and Maki.
Chihiro Fujisaki: Incredibly overrated, wasn't really fun to me, bored me, honestly didn't give a shit when he died, hate shipping him with people, didn't really do much ig.
Gonta Gokuhara: Everyone treats him like an innocent bean while he somewhat willingly killed Miu, bored me, found him annoying after chapter 1.
Peko Pekoyama: Bored me a lot, YOuNg MaStEr, felt like she was just made to be killed off, wasn't around long enough for me to like her ig.
Mikan Tsumiki: Hated her relationship with Junko, annoyed me from the start, made me extremely uncomfortable, boring, felt somewhat like a "Mary-Sue" character, hated her execution and hated her reason for killing Hiyoko and Ibuki.