[Starscream Gaga]

So what is the difference between the victories the Zangyack have made against the Warstar or Gedoushu? I can't think of any victories either made in their series outside of the final few episodes of their roles as adversaries, which exactly the same as the Zangyack, although their late victories are actually much more notable then Warstar and its fellow Goseiger Villain teams. Basco is Gokaiger's Juuzo, filling the role of an arch-nemesis to Red who is not directly affiliated with the main villain teams, so there's no need for the Zangyack to have one as well, too many "bad-ass" character is jut as bad as having none at all or over-using them leads to nothing but Villain Decay in a Tokusatsu show, which is why both Basco and Juuzo being used sparingly is so good.

And people have already explained that the failure of Warz Gill's invasion compared to the rest of the Zangyack is an actual plot point, not just a plot hole. Akudos Gill's fleet arrives later, which includes all the planet-destroying generals.

But Dereputa? That's just an example of how subjective this topic is. I can barely remember him outside of his first two confrontations with Alata.