Tangled, try to lower your expectations surrounding his family's behavior. Blood is thicker than water in these cases, and parents, siblings - they are far more likely to take sides with their own kin long past the point of reason.
This is all part and parcel to why alcoholism is often referred to as a "family disease."
He is saying and doing all of these things because he is an addict. His addiction is trying to protect itself, and he doesn't even realize it right now. Until he does, until he is ready to recognize what this is costing him, this will get worse. Better that you and your little girl do not have a front row seat for this chaos.
This is way beyond "taking a healthy break."