Gog frustrate me. It seems that Linux users and people who dislike DRM are natural bedfellows, yet they continue to not support Linux even after saying they'd bring Gog Galaxy to it.
Now I'm sure people will reply with "why don't you just configure bottles, why don't you install Wine and these 30 prefixes, why don't you install Lutris", but all of that has quirks, extra set up time, and extra complexity.
I don't want to battle my PC, that's half the reason I moved from Windows in the first place. I just want to open the launcher, click install, then click play and have it work. Steam has that going for it.