Sick of relationship

Mary
Rant .. My poor daughter always expects to be yelled at and she's only 10 months old. 
Her dad always bitches at her. He can't "watch" her for a few hours when I work at my part-time job. He can't handle her. All he wants to do is be lazy and do nothing. He always just wants her to go to sleep. Yea he has his days where he has his laughs and everything but the majority of the time he's always an ass towards her.
I can't get him to change.
We're at a point now where we're better off separating. I want to leave him, I really fucking want to leave him.
I hate living with him. He's like a fucking kid , he can't do anything for himself. I does everything for him, & he leave mess every fucking where he goes. I'm seriously fed up. I can't do it anymore. He's so friggen useless. He also gets upset like a little kid just because he never got his fucking shit for his stupid gun . Like a kid with a toy throwing tantrums. I don't know why I ended up with someone like him, I really don't. I'm the man in this relationship. I babysit during the day, 2 toddlers. And my own baby. & I work a part time job.
I'm from a different town and come from a big family and there's no space for me at home, and I wouldn't feel comfortable living with them.
We live with his parents in a town where I know no one, and I have no where to turn. No one to talk to. Seriously I'm at a breaking point where I wish I can hit him with a to me of bricks. 
He's the laziest fucking excuse of a man that I ever met.