Funny, that's not the experience of the majority of people in this thread. Several flavors of Linux that have been listed are rock solid and require little to no user action to work and launch games. You can list all of the problems you want, that's just 1 person's experience. It could be because of the distribution you chose, because of your skills, anything. But it's not statically relevant.
Also, please, Windows is known, has been known, and probably will be known for having shit break randomly. Don't you think there would be a tiny bit more Windows dominance on the servers side if the opposite were true?