I do use the triangulation/mesh creation tools in syntheyes a bit (which are pretty cool), but not much else. And I mostly agree with your assessment of the software. It’s very innovative in its ways of confusing and frustrating me. I’ve found some good tips for using it in Reddit threads, fwiw.
I’ve yet to try PF. My appetite for learning another 3D solver is vanishingly small.
I also don’t hate the flame 3D tracker as much as some people do. Living on teradicis for the last few weeks has forced me back into a relationship with it, and while it doesn’t always cut it, it has saved my bacon more than once recently.