That's too bad. No doubt I appreciate it Steam for what it is, even knowing that I don't actually own any of the software I buy from them. That being said, I try to support GOG where/when I can.
Is there any "easy" way to get GOG games running on a Steam Deck? It's been awhile since I last tried to look into it, but back then it seemed like a lot of steps and a lot of places to potentially mess up the process. I believe I kind of got something working at one point, but I'd honestly have to go back and double check.