You are giving ants way too much credit. Those fuckers are brutal war criminals, the lot of them. Humans are bad, but we've had nukes for almost 80 years without glassing ourselves, ants wouldn't last a day
No, because I'm assuming that one colony will wipe out the rest and earth will be ruled by the hereditary line of matriarchs of whatever the queen ant evolves into.
They'll probably enslave and brutalize all other species on the planet, but they'll rule earth as a single unified colony, and space as an extension of that.