Valve is a capitalist company, aiming for profit.

They were heavily involved into establishing DRM in the video gaming world.

They were among the first to establish "FreeToPlay", Lootboxes and whaling, a predatory business tactic.

They accepted right wing extremist games in the past.

They have a kind of monopolist web store for PC games.

They are known to use the embrace and suffocate tactic against community projects in the past (DotA, once a community driven project is now a trademark of Valve).

The linux gaming scene is flourishing, but this comes at the price of dependency. And not all this dependencies can be resolved at the will of the community; many of the users that came over in the last time are probably unable to start a binary without help.

Valve is a wonderful contributor to Linux. Look what a beautiful wooden horse they have gifted to us!