TAL, Slow down and take a deep breath. You have fought too hard for your marriage. I know you don't want to lose it.
I agree with Sara and NC.
Don't beat your head against the wall expecting him to do things you would like him to do as far as chores and child care go. It doesn't sound like he has ever done that, so I think the hired help is the best possible solution. As long as he isn't fussing about it, go with it. I think you both will be happy that way. It doesn't seem you two have much time together, don't spend it fighting.
NC is right men and women are so different. We expect men to be mind readers, and they are not. I think in your case maybe you need to use reverse psychology on him. When he says he wants to go hunting, say "yes, you deserve it, you have worked hard and deserve some downtime to enjoy, that's why I hired the mother's helper". That will be a 180 for you. I think it won't take long before he realizes how hard you work too for the family and start doing things for you also.
Remember that men are the hunters and we are that gatherers and nurturers.
Hugs, Yoyo
Life's challenges are not supposed to paralyze you, they're supposed to help you discover who you are. -- Bernice Johnson Reagon