Actually people hate Comic Sans not only because it's overused, but also how it is overused for things that don't match with it. Comic Sans is not a neutral font, I mean, is not like Arial or Times New Roman that are plain, simple and good for reading. Comic Sans is... COMIC (and in a very lighthearted and silly way).
Yet people make horror games, write love letters, and all kinds of either serious or just noncomical situations with Comic Sans. How am I going to take that seriously? xD.