Again, you misconstrue criticisms as complaints.
GT doesn't exist in a vacuum. It can — and will — be compared to other games in the genre by people who, y'know, play games in the genre. Some aspects it does better than the competition. Some it does not.
You're also (willingly?) ignoring all of the positive comments around the boards. If you want an echo chamber of nothing but praise, you'll have to look elsewhere. Constructive criticism should be welcomed: in fact, it very much is, considering Polyphony actively invited it with the beta.
Like @skazz said, being critical doesn't also mean people will not play these games, or enjoy them. Here are my thoughts from the beta from another post, as an example:
Last edited: Jul 18, 2017