I could use Photoshop in my art creation, but I refuse to. Affinity Photo is good enough and doesn't cost a lot. I might miss a few features but my life is more pleasant without Adobe.
That said, I understand there is a ton of open source engineering that goes into it, and I have a great respect for the effort.
What is your problem with it? Is it too ugly? My complaint is that it takes too much clicking to do a lot of stuff.
People tend to complain about some so called missing features while they were living happily without them when their favorite software didn't have them too.