This seems to be te main reason for the unbalanced team games. The devs made an error in the Elo calculation. As result TG rating is inflated. So your rating is more like something that represent how much you play instead of how well you play. So elo dont reflect your skill very well. As result game are unbalanced.
That thread i started in May 2020. I even think this issue was part of the game since the release. Until now the devs never respond to this issue. So it looks like the devs dont really care.