@rysiek (Was # FLOSS a typo? Did you mean #foss )?
I am always on the lookout for good open source art programs. Medibang Paint has been pretty decent for my samsung tablet (Free). Clip Studio Paint has a $5 sub on mobile. It has been ok.
Its harder to find decent FOSS art programs. Blender3d is what I learned on, and is in many ways better than Maya. GIMP/Glimpse UI is still wonky.
But unfortunately, as long as companies think Adobe is the standard, they'll keep forcing artists to use it.
@rysiek RE: #FOSS
Ah, you did mention UI/UX issues. And documentation. That is the main thing a lot of these free programs are lacking. Blender3d has fairly good documentation, and if you are a shortcuts person, its amazing for that.
GIMP has been a struggle to use (Broke off into Glimpse). I only program in python, and I am a beginner at that. And GIMP has been confusing to use, with tablet driver issues.
Writing drivers is insane programming work tho.