There are so few habitable planets here... so few. To get three planets like this, yeah, it derails the game, especially on a small map.
I don't mind ships being slowed down, research boost, whatever wacky stuff happens. But three mega planets in one home system? On a small map where all the planets are colonized? No, that's crazy.
Good to know the quick game uses your previous settings.
Oh well, this was a learning game anyway.