I really like steam but I don’t use it exclusively and I wouldn’t recommend doing so.
I shop around and I own many games on GOG in particular, which is DRM free and also convenient in its own way. They provide installers for games so your library is truly independent, and I have used Lutris and Minigalaxy to get those games running on Linux (with Proton) including on the Deck
Steam is great but it is basically DRM and not the be all and end all of gaming. Competition is good for everyone and I will generally try and buy from GOG if the price is the same or even if it’s slightly higher because I truly own my game data. That has a value in itself.