Something that a lot of fandoms need to understand is that while you can like a book or a movie or a show that has flaws, liking it doesn’t give you an excuse to ignore its flaws.
If the only POC representation in a show is tokenism, point it out. If a movie is dripping in heteronormativity, point it out. If a book has problems with character development or Mary Sues or even writing quality, point it out.
Liking a work doesn’t mean you’re allowed to put it up on a pedestal and act like its flaws don’t exist. Instead, it’s your job to acknowledge and accept those flaws for what they are.