They can’t even keep their original promise of DRM free games.
For example, they thought they could get away with selling latest Hitman with its always-online DRM, and only changed their minds after the backlash.

Also, from the beginning they’ve been promising to support Linux.
Nothing but empty promises so far, they didn’t even have the decency to publicly admit it’s never happening.

Valve, meanwhile, didn’t promise anything, but quietly funded the development of Wine and all kinds of related open source software.
Thanks to their work I’ve been able to completely ditch Windows a few years ago.

For this reason alone I’m glad to buy from Steam whenever I can.