I have grown apathetic towards my family because of the way they treat me compared to how they treat my brother

They weren't bad parents, I wasn't abused or had to go hungry. They worked hard to provide us with the best life possible. But it was pretty clear that they favored my brother. Everytime they needed someone to blame or just to take out their anger on someone, it would be me. Whenever I made a mistake, it's because I wasn't careful or I wasn't paying attention and when he made mistakes it was because of lack of experience. If I got anything less than perfect marks, it would be because I was lazy, he gets shit marks, it's because he's depressed even though both of us are diagnosed.

I can keep going on about it. I remember breaking down multiple times wondering why they won't love me the same way. I worked my ass off trying to get closer to them because I believed it was my fault they didn't love both of us equally. Eventually I just gave up and stopped letting them into my life, keeping contact to a minimum. I hope I keep it that way. I don't think I'll be able to forgive them because this is something I've brought up multiple times, and they said they'll change but they never do.