Usually when I'm critical of Linux (in a desktop context), it's because I see a lot of potential for Linux to be the absolute best desktop platform out there. It already blows away the competition on a lot of different metrics, but some parts of the overall user experience do sometimes feel clunky or buggy or otherwise non-optimal, and it'd be awesome for that to someday not be the case.

A desktop Linux distro could combine the user-friendliness of the Mac world with the power-user-friendliness of the (pre-8) Windows world and turn both up to eleven while bringing its own element of stability and dependability. It won't get there unless problems - even if they seem minor - are identified and resolved.