As for GIMP, while I understand it can do many things as Photoshop, it is not close in terms of features and the UX is unfortunately terrible.
Read this: https://gist.github.com/stdNullPtr/2998eacb71ae925515360410a...
No one reached directly for kernel-level anti-cheat. It was the result of an escalation of the sophistication of cheating solutions.
People who work with Photoshop have never worked with any other thing. The way they learned to edit bitmaps was through Photoshop. They can't separate the act and the product in their heads. Thank god for Affinity getting into the mix.
One just has to deal with GIMP as it is, and stop trying to project Photoshop paradigms onto it. People just need to stop thinking of FOSS as the generic, off-brand or ersatz versions that pass or fail due to their degree of imitation of some other product.
IMO, every step GIMP takes towards Photoshop UI is a regression. GIMP's problems have been technical, such as color management and non-destructive editing, and they're gradually falling away.