For some reason, this stood out to me. It really wouldn’t have been that difficult for him to say “Wow, delicious left-overs for days — thank you so much for your generosity!”
Dealing with mental illness is not easy, especially when it’s your Mom and it becomes important to pick your battles — which I know you do. Sorry he couldn’t muster that up to make your life a little easier. Glad you’re not with him anymore.