It starts off good but gets really bogged down in its own waste after a while, IMO.

Alan Dean Foster wrote a series with basically the same premise in the 90s, where evil mind control telepath aliens were waging a war against a bunch of free alien species, and the free alien species were hampered by the fact that very few aliens were capable of fighting at all, let alone effectively, but the evil telepath aliens could mind control their conquered subjects into fighting anyway. And then the losing free aliens find humans, who are basically xenomorphs crossed with hannibal lecter compared to the aliens and conveniently immune to telepathy, and they realize that humans will fight to the death for dumb shit like precious metals.