why do people hate JW's so much?

sorry if this is insensitive/a dumb question :( i don't know much but me and my mom are ex JW's, my grandparents are. my mom told me about some of their beliefs and how it screwed her a little bit at first (about not believing in college i think) but like ?? why do ppl think it's a cult?

im sorry if im just uneducated, i dont have much religious experience at all and im a teen. don't wanna ask my mom so i came to reddit😭