Why so angry at the end?

They all know what our Mc knows( that hes using our Mc) MC found out by accident as the commander was out of it . So i. The teams eyes hes just a valuable asset and the Commander shouldnt be getting attached (but he is tho he doesnt tell anyone) so the members i feel some are growing fustrated with his unserious demeanor yet at times he gives such an air of seriousness which doesnt allow others to swoon or appproach much our MC