TL;DR: Source2+VulcanAPI+Insurgence of SteamOS IS going to bring a level of gaming on Linux we've never seen before. It's not there yet but is coming sooner than you think. Pretty much everything else on Linux works as good or better than Windows.
I realize you're not doing any new stuff on this channel and that you were (obviously) pretty disgruntled over your recent Linux ventures however, a video like this makes it sound as if everyone whom tries Linux will get nothing but frustration from start to finish. Perhaps that's true but it's all matter of perspective. I've always felt when one gets to a level of frustration with something the proper course of action is to take a step back, ponder over what may have went wrong, casually research, and if you feel like it pick back up again when the time is right. If you keep a Windows install handy and available it's as simple as rebooting and selecting a different option when presented.
Perhaps Ubuntu has comes such a long way since I last used it that it's just that much better or, perhaps my own inner development as an IT pro and human being have ushered in new understandings. Either way, I've been using Ubuntu as my primary work rig OS for over two weeks now and you know, I'm not sure if I'll ever go back to Windows unless it's to play a non-Linux compatible game. I'm sorry this is just a long comment but I wanted to let others out there know that using Linux can be a challenge but how you accept the challenge is what determines whether you'll be successful. The same is true about all things in life. You can be a part of the problem or you can be a part of the solution. With Linux, you can be both and through doing so provide yourself with actual real-world value in the IT industry.
A word of caution though for those looking to try it out; Games, particularly uber-pub AAA games, are a ways from being mainstream on Linux so don't overwrite your Windows install thinking you'll be able to play all your favorite titles on Linux... yet. I will reiterate though, Valve and SteamOS are going to provide a new conduit for Linux gamers which is extremely exciting. As far as everything else goes, Linux works just as good or better than Windows if you're willing to think critically and learn new things. If you're looking for a change from MS/Windows, Ubuntu is a fabulous place to start but, there is no "easy button" so to speak. Put on your binary ass kicking boots and make your machine do what you want it to do. Part of the fun in using Linux is to see how far you can push it and yourself.