@NotKusou He couldn't skip the side missions because he was weak, like how you do side missions for extra exp. He was weak but his teammates were strong and they forced him to do the side missions like it's the responsibility of a hero. Remember one thing, at that time he was weak and he was holding it in, like how you hold in stress it isn't healthy since at a certain point it just explodes. This would be one of the better cases of what a regular human would be after all that time. He is used to sanitary and a decent life, however it took his rights away and he needs time to adapt. TIME TO ADAPT. But he kept on going on as the hero with basically no rights as we see that his teammates put all responsibility on him when Lannvel(I think) died in the first run. For example a dragon, you would either take it as a companion or kill it for exp. His teammates forced him to leave it alone even thought it was the chaos dragon Neobius(I think once again)successor.
So #1 he was weak, as you expect from an average highschooler(I think), and so he when he was "training"(with Alex) he saw it as abuse since he was so weak he couldn't fight back and couldn't learn. He couldn't run since Lannvel was there and besides it was his FIRST run so he was careful and his teammates would force him to do the side missions saying IT'S THE HERO so you're supposed do charity work. We're told that he assassinated his teammates but not fought them which shows even at the end he was weaker. Essentially he couldn't escape and eventually broke and he couldn't train since his training is from Alex(which is basically just abuse) and him following his teammates is how he got stronger
#2 It was bad considering sanitary issues and convince since he is used to it all his life before his summoned
Overall message: Give him some time to adapt and stop being barbaric and talk it out like a proper human being
