Future MIL & FIL

Ok so my Fiancé and I have been engaged for over a year now. well about 9 months ago I moved from Arkansas to California to be with him. I knew that he still lived with his parents in a tiny ass apartment ($975/month for a studio...). well his dad said him and my Fiancé's mom wouldn't argue as much anymore. 9 months later and they're still screaming and yelling nearly everyday. He has a 30 yo half brother on his mother's side and he's homeless. He's a full on druggy and his baby mama had kicked him out of her house. So his mother had been bringing him here to stay. He made me feel uncomfortable and I've told my Fiancé so. last week I think Wednesday or Thursday him and his brother got into a fist fight cuz his brother was being disrespectful to his mother and me calling us whores and bitches. His family keeps getting mad at him saying he's choosing me over them. We're planning on leaving his parents and moving.. But his parents don't know yet and they're trying to make plans to get a bigger apartment together. his dad is disabled and his mom works but can't save money. his dad is struggling to get disability too. Is it wrong of me to want to leave so bad?

OH! Some things I forgot to mentions. his father is an ex drug addict so he sometimes acts very.... not all there.... his mother is still smoking weed but she used to be an addict too... (my Fiancé still thinks she does meth or some other shit... So I don't want my future kids around that... we've been ttc for 8 month and gonna take a break til we move) Truthfully I don't feel safe here. I don't really have anyone to tell any of this too either. Thank you for reading... I know it was long.