I am sick of trying to find good alternatives, and I really really want to install photoshop (have sub through work) but I really really _really_ don't want to install creative cloud.
@PeterFalkingham
I do a lot of stuff on an iPad now, because the pen experience is so much better (half the latency of a Wacom). The best painting app is Procreate.
On my computer I use Photoshop, although Affinity Photo and Pixelmator Pro both work for me. Painting is not really demanding in terms of features, they basically just have to avoided screwing it up.