Steam games suck on Linux...

​You have valid points, but to be honest, this has already greatly improved and pretty much already fixed.  I basically play all my games in Linux, I have 144hz gaming monitor with Lightboost that works as well.  For Lightboost to work, I must keep my FPS over 100, and I can do that with nearly all the games I play with very high or decent graphics settings.  But years ago you were definitely right, for example, when I installed Team Fortress 2 on Linux around 2 years ago, it was unplayable.  The FPS was around 10-15 and the game stuttered constantly.  You literally couldn't do anything.  How does it run now?  I get over 100fps and it is flawless.  I play many games on Linux through Steam with very good performance, such as: Dota 2 (Sure Windows gets more FPS, but I am still getting over 100 FPS with very high graphics settings), Counter Strike Global Operations (I am getting over 300 FPS here with decent settings), Football Manager 2016, Arma 3 (around 80 FPS with decent settings), some Total War series games (like Atilla, Empire, Medieval II), Cities Skylines, Half Life 2, and Insurgency.  They are games that I play often on Steam in Linux and they generally all run over 100 FPS on very decent graphics settings or less than 100 FPS on very high graphics settings.  I tend to think then, that your problem is perhaps your hardware (e.g. too old or not set up correctly) or your graphics settings (e.g. anti aliasing is a HUGE FPS killer).  Hardware problems will most likely need money to fix, graphics settings problems won't, you just need to try changing some settings.