In short, the story felt rushed.
With only 10 episodes to spare, the ending wasn't impacting. The Final boss of the show is brought to light in episode 9 and in the Final episode, how else are they going to finish it? They're wasn't enough time for characters to show more sides of themselves or what certain meanings lie in the midst of their interactions. Some scenes should be extended to show more impact and fall so flat after it ends abruptly. It is a little annoying that some characters don't put up a fight either, like when they get out-numbered or an enemy shows, they don't try to think of a plan to escape or anything. They legit give up and it shows that all their time fighting/ training is for naught.
Wish there were more episodes so it would pan out better, but it is what it is.