Statistically speaking, there has exist a group of smart Kazons and just noped out of all the bullshit.
They can't all be stupid dipshits. There has to be a small subset of Kazons, that were actually smart enough to not only find water but upgrade the Trabe ships they stole.
Trading with others, gaining more knowledge and resources. They might have even acquired a slipstream drive and level the rest of the "hillbilly" Kazons behind.