Definitely too much imo. You're not overreacting
As wonderful as it is that he works full time and helps you and stuff but the pub 4 times a week is a bit much, you need time for you as well plus the pub is expensive, he could easily come home one night and say you know what I’ve got this, you go take some time, even if it’s just for a sleep, a bath or go out and see friends or family or whatever, that time is precious and a lot of mums don’t get it, we are 100% available for our babies 100% of the time but sometimes that involves taking us time to refresh ourselves before we get burnt out, I think you should have a conversation about it, maybe the pub 3 times a week and he gives you one but ideally it should be equal but sometimes beggars can’t be choosers x
I would feel the same way you do.