Is it wrong to feel anger toward my mom?

I am 19 and i have thing called autism.She won`t ever let me be free from here because she get 500$ a month from the government due to my autism.She treat me like totally baby.She tell everyone that i got autism and no matter how hard i try to tell her to stop she keep on doing it.Every time i try to tell her to about this she changes the subject on herself.I should not put up with this.I do not want to live in group home because i heard it is even worse living there in group home then it is with my mom so i try so hard to think of plan where i could legal leave her so i can be free from her controlling chains.I am agnostic and she is christian talking about how the antichrist will take over the world and how liberal are destroying america and always making fun of Obama,and telling me to look at her status on facebook about what someone said about him.What should i do?I feel trap and i wish that one day autism would no longer be consider mental disorder like ity was back in 1973.I feel so depressed right now.