His comment has nothing to do with quality of software or quality of support, but is about dealing with NVidia. Trying to work with NVidia (as a hardware manufacturer) must have been frustrating, but that has nothing to do with quality of the software.
The video is 12 years old. A lot changed in the meantime.
AMD has open source drivers and crashes often. NVidia has (or more precisely had) closed source drivers that nearly always work.
