Why I dislike Junko Enoshima

I find Junko to be a brat and gives off the Mary sue vibe. I'll be going to the reasons why I think she is a terrible character to like and I'm not saying erase her existence I'm just kind of ranting on her. Fun fact! She's my most hated character and haiji is My second hated character. Basically I only hate two characters.
Oh btw I based this off amino because I can.