I have never been in a good and equal relationship, so i don't know if my advice will be of any use....but here goes...
I think there is a some truth that whilst many women look around to see what can be fixed, done, improved for themselves and for their families some/many men often just go along in the same old way as long as it just about works for them.
You are obviously a thoughtful and organised person; perhaps use this to highlight to him the 3 top priority things that need to change for you...be specific, be direst and give a time-scale and the reasons for it.
When we argue often everything comes out and it is overwhelming, depressing and awful. For both of you the argument may have made your problems seem insurmountable. if he is overwhelmed and lacks an ability to tease out the problems himself he'll stick his head in the sand and ignore them hoping they are going away.
You may find you get some better results by saying "DH once per week I would like to be able to ........... for me to do this please would you (arrive home by this time, put the DCs to bed, make dinner, make DS's lunch for the following day)....he will either rise to the challenge or not and if not then it gives you a specific and direct thing to challenge and work through together.
And I think Spero's point about kindness is very well made...perhaps make a pact together to be consciously kind to one-another (it needs to go both ways)
good luck and hope that you can find a way to do counselling together (Relate do have bursaries available)