batchel....I divorced my children's dad while they were still young....2,3, and 5yr. old.
I took my kids on camping trips and trips to the beach, etc.
Their dad was too disagreeable for us to do activities, together, with the kids.
Sooo...I invited other adults along with us for the trip....or, sometimes, my sister....
We always had fun!
I think you will come to realize that you will have to lower the bar on what you expect from him.... and establish new patterns as a single parent.
You might want to establish connections with other single parents, and do things with them and their kids....There are lots of such groups around, like that, these days...lol---google, google, google....
the reality was that I probably did more stuff with my kids,,,even as a working mother with a limited income (at that time), than parents that were still a couple....Who knew?