What to do about excessive colonization in Endless Space 2

Endless Space 2 has a colony satisfaction reduction. If I remember correctly, there will be an initial limit of 8 galaxies. If you colonize more than eight galaxies, the satisfaction will be reduced (it seems that every time you colonize more than eight galaxies, your satisfaction will be reduced. A galaxy -15, maximum 75) Researching advanced government technologies in technology research can increase the colony limit, and initially carrying the imperial trait "Fanatic Colonialist" can reduce the satisfaction reduction (per level/25%)