I feel like I failed with my 3 year old. He hasn't seen any consistency. One minute he's being…

I feel like I failed with my 3 year old. He hasn't seen any consistency. One minute he's being watched while I work by my mom, then it's his dad, then he's in day care. When his dad and I are on bad terms he doesn't see him for months. We live with my mom so we have to walk on egg shells, he's always seeing her angry or mad whether it be about life or us. He's 3 he now ask me, is Nana always mad or mean? I want to cry. We should have our own house and he should be in daycare where I can pick him up and drop him off. God please make a way. Now he has a brother coming who will take up more of my time.