I’d be inclined to agree, but I would tend to be critiquing what GP actually said, which is the the gui is totally ‘non-native’. I think you were in part correct to read the ‘native looking ui’ portion into the comment though, it would seem to be a common refrain that gui’s need to appear conforming to the OS’s chosen aesthetic and visual formatting. However, a very real complaint echoed in a sibling comment is the failure of non-native gui’s to respect or implement the OS’s operating behaviors for gui’s. I have no issue with visual differences between applications, but I want clicking and keyboard behavior to remain constant across my apps.

As sibling implies, it’s a thousand small differences that build up, creating friction that foster the push to native GUI’s being the preferred, if not nearly mandatory, solution.