Can't accept the bitter truth? Just look at all the articles on nouveau garbage right on this website.
The developers are wasting time trying to write open source drivers that clearly will always be inferior. Even the Radeon open source drivers are terrible and not to mention AMD doesn't even release full documentation for things like UVD. Intel drivers? Just as terrible and lag the Windows drivers that has higher performance and OpenGL 4.0 support.
Open source driver hypocrites are hilariously unfunny, they don't go after companies like Imagination/PowerVR which don't supply any Linux drivers or support Linux at all but attack companies that provide the highest quality Linux drivers.
You can have any opinion on software licencing and video drivers you wish, that's legitimate. But calling people who are giving you free code "garbage" just because your game runs faster with a different driver is psychopathic behaviour.