Wishing may be able to share some info on the DivorceCare sessions. I believe she has been attending them.

Yes, your h is not able to multi-task and wanted help with the boys and their various activities going on at the same time. Little does he know or even recognized that you've been multi-tasking for a very long time and doing everything on your own.

As for his temper tantrums, just shake your head and walk away. Eventually you will get to the point that you can actually laugh about them.

As TS has pointed out, don't react to his antics in front of him. Beat the crap out of pillow after he's gone or as she pointed out, give him the finger once the door is shut.

I do hope today is a better day for you.

Sit quietly, the answers will reveal themselves when you least expect them to.
The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.