Seriously, I can relate. I have a wonderful husband, but when he got home from work, he took over. And I was okay then. I just couldn't do it 24/7 by myself. I know your husband has worked all day, but so have you. You were justified IMHO and don't feel badly about it having meltdowns.
I have been know to go do errands when he got home so that I was away from the house.
Can you get a high school kid to come in for back up in the evening? It's for your own health.