As someone who prefers to play games alone, it's frustrating. The first five minutes after installing Steam is a constantly stream of "stfu and stop shoving game release/update/sale announcements in my face", "gtfo with the popup messages that a friend is playing a game", "wtf? why are you auto-logging me into the messenger", "no, I don't consent to you building a hardware inventory of my machine and using it for internal stats", and "jfc, please just leave me alone and let me play some games".
It's almost enough to make me buy a shack in Montana and support the post office.