The Astounding Antagonists

This book had to be the conclusion of a trilogy:

part 1 - Origin Story, the author gets us familiarized with the cast, as we pick sides. he's GOOD at characterizazion.
part 2 - Battle of Tenet, and where the heroes starts going crazy while the surviving villains rethink their positions
part 3 - The circle is complete, the villains go more anti-heroes and the fallen heroes are defeated for good.
Cramming everything in one, way too-short book, gives life to a confusing story, you can't really familiarize with the cast. Sure, some of them are more interesting than the others, and given that this is about the supervillains, it is them that get the betters spotlight...but at the sime time, they are too close to be antiheroes while their enemies are too embedded in their corruption. Without understanding how and why.
Regardless, the pacing is good, it's almost always engaging, and it's not wasted time. But I had better expectations and in the end this doesn't deliver.