Is it normal that i cant stand my mum

Im 30 years old still at home because I cant afford move out yet my mum is a person who throughout my life has never not bought me things for xmas and iv always been fed and a roof over my head which I really appreciate but to me that counts for nothing when your horrible to people everyday shouting about everything a making everyone leave the house my sister just moved out with her boyfriend because she couldnt hack it anymore. The excuse my mum always makes is that she bought me this she bought me that in the past but to me its not about what you buy id rather hav had nothing and had a normal mum she has no friends because of how she is but she says she doesn't care. Ever since I can remember my friends when I was at school wouldn't want to come back my house because she would shout at them for leaning on walls and show me up. I ended up getting into drugs and other things at 14 and stayed out on the streets every night till around 11pm just to keep out of her way I dont blame her for me ending up on drugs but I think if my home environment had been happier id been home more and wouldnt have ended up In the same crowds I was on drugs for 15 years im just getting clean and I thought she might change aswell but nope. Shes crazy but shes still my mum and I love her but honestly I cant stand being in the same room would love moveout but cant afford. What im asking really Is it me in the wrong when your housed fed and waterd and not gone without all your life but still cant seem to like or want to be around you mum. The way I see it is id rather had a mum like my mates someone you can talk to when you have problems or chat about the day or anything really, just being there. Is it just time to accept thats how she is and keep away because now im older I see how horrible and nasty she is never wrong always screaming round the house and I feel for dad who just wants a quiet life what to do please help