Why is my class like this

So at school i have changed this year and i don't know why , i did some bad stuff and i am the president off my class and everytime something happens my class is like we need to change the president she always fights. ( Like i am always the one who does something bad) Now listen they have did bad thing's to these past 8 year's we are together and now they make me look bad while they are bad to , they're acting innocent and i know they aren't , the first time my best friend came to this school they were gossiping about her and bullying her plus accused her off threatening one off them with scissors etc...(they still didn't apologize and it's been like 2 year's since that happened) that is just sick keep in mind i have done not THAT big off problems like them , and this is probably the exact same reason why i changed because off THEM and they have the audacity to accuse me for everything that happens .