I sure hope those aren't the same reasons you stay away from the GTA series. If you stay away from the GTA games because they're badly-made and thus badly-rated, you're staying away from them for a reason that doesn't exist.
GameRankings.com lists the following composite scores (given as the ratio of positive reviews to negative reviews) for the most recent entries into the GTA flagship series:
Grand Theft Auto: San Andreas
Publisher:
Rockstar Games
Number of P/Reviews:
743 PlayStation 2 94.9%
Grand Theft Auto: Vice City
Publisher:
Rockstar Games
Number of P/Reviews:
272 PlayStation 2 94.1%
Grand Theft Auto III
Publisher:
Rockstar Games
Number of P/Reviews:
259 PlayStation 2 95.0%
So...I don't think you can really object on the grounds that they were reviewed badly. And sure, you can object on the grounds that they're poorly made, but the same reviewers you seem to trust to review games like Black & White 2 or Playboy Mansion and give them accurately poor scores gave the GTA series high marks. The impression you're giving is that the reviewers' scores matter to you when you agree with them, and you can disregard them when you disagree.
I do agree with the rest of your points though.