Sentenced to War

I have mixed feelings about this one, I liked the military setup, most of this book is about the MC and his team training and really liked that, in my opinion it was realistic. But what I didn't like is the characters, some were okay, some were dull, I didn't care about most of them and no world building, I almost dnfed it, but i forced myself and finished it, and I must say the last pages made it slightly better plus the plot twist. So I'm giving this series a chance by reading the sequel and see if its worth finishing or not.