You are worthy of so much more than how your father or stepmother treat you. Unfortunately they're not going to change because you want them to. One thing that's been hard for me to learn, is that if you're waiting for other people to change in order for you to feel better, that's giving them power over you. They've made you feel helpless and worthless because of their own insecurities, it makes them feel better to criticize anything they don't understand. But it has nothing to do with you and who you are. Once you can own that, their words and actions will have less of an impact on you.

it, like a lot of mental health conditions, is a scary thing to try and understand you have to be so open to the fact that what you can do is often very limited, however as a parent he should realise what not to be doing his wife doesnt exactly sound like she helps overall i guess some people just want an easy life. Do you have any support or people other than family you can lean on in the difficult times? sorry rereading this it seems less than useful 5.37am my brain seems to have shut down again

You need to stick more with supportive friends. Maybe even bring one along, for support, when you feel a need to visit your dad. You step mom sounds like she and Tom Cruise would get along and your father seems to have a reading disorder or some form of attention deficit disorder.