Some of it can be chalked up to the author (juvenile writing, dumbing down characters for exposition dumps, weird and jarring humor scenes) 
and some of it is the translator (whole chapters where multiple characters get assigned the POV character's name so it become VERY confusing just what is going on, disjointed paragraphs, chapters out of order, as well as usual MTL shenanigans) 
leading to the whole thing just being boring or an exercise in frustration.  I was kind of here for the dynamics, the aliens, and the weak to strong characters, but it leaves a lot to be desired.