There is just something about Comic Sans that feels.. cheap? I can't explain why. I don't hate more 'playful' looking fonts. Baby doll for example is quite similar but something about it just looks much better. It might be the height, the form idk but Comic sans was always a font I disliked. Even back in school where I constantly saw it in PowerPoint presentations lol. I don't dislike it because of being "overused". I see many fonts over and over and I'm not bothered by them at all.
But it's not a hard-to-read-font which is something I like about it!! It's a font that can be used pretty much anywhere. It's simple and clean.
Is it fair to hate comic sans? no, not really. The font is completely fine. I just wouldn't use it for any project myself.