There isn’t even a real photoshop competitor in the broader market, but you want to further split the hobbyist devs effort on linux as well?
I think instead it would be better to focus all the effort on a single solution that strives to cover all of photoshops features, with at least equal or better usability. Like has been done with Blender and godot for example. (And GIMP is sadly faaar from it still)
Can run on Linux via Bottles! I do not have much experience with it, but I got it running with this guide from 2022:
First google search result
if you agree with the opinion that’s fine, but why would you admit to posting SEO spam? XD