You mentioned on another thread you felt it was impossible for somebody without children to understand your position.
Could it be possible that you don't understand the position of people that have been through what you are only starting to experience, in some cases, for multiple years?
Every post seems so focused on your H and his issues and really, you need to focus on your issues and if you are not ready to do that how about finding some solutions for problems you have mentioned several times?
If the children wig out at 5pm for dinner what would be the solution so that does not continue? Are you familiar with "once a month cooking" (and yes, you can do this preservative free with organic and whole foods)? If not there are an abundance of free resources online. If you arranged it with your H (or a sitter) you could free up the day it takes to do this for the month and much of the "5pm wig time" might be eliminated.
What about a "mother's morning out" program for your children to attend? What about calling the local university and seeing if there is a grad student in the area of special education/child psychology looking to pick up a few hours a week of child care work?
Dinner's Done is another idea. It might not be called that in Canada but I bet they have something similar. It again would eliminate the 5pm rush and get you out of the house, meeting new people AND allow you to prepare lovely meals for your family.