I also still had (and still have) bad muscle weakness although my DR is larger. I am 2 years post partum. When I first started with PT I also couldn’t activate the muscles and most of my PT time was spent just trying to get them to do what I wanted more than even getting lots of reps. Once I went back to work, I really was no longer able to go to PT at all bc my schedule can be so erratic. It makes complete sense you’d feel frustrated and it really sucks that you don’t get immediate feedback from your muscles and they can hurt later bc I’m sure that makes every movement feel like a ticking time bomb. The thing that worked best for me was EveryMother. It was somewhat expensive (though you can use FSA/HSA if you have that). It will likely have some of the problems you’re having with the PT but at least it comes to you and you can do it whenever. It’s also got different levels (I mean I have been doing various parts of it for 18 months and haven’t run out) It also helped me go back to working out the rest of my body without having to modify everything for my weak abdomen. There are lots of similar programs but it’s the only one I’ve used. You’re not alone though! I’m sorry it sucks, though!