Oh. He doesn’t fight back anymore, not at all, because Maes is right to be so furious with him, and he just ends up hurting the people he cares about when he tries to explain how much he hurts, so really
Roy Mustang just keeps it all inside. You can see why he didn’t handle the death of Maes Hughes well at all. He tries very hard to repress his most poisonous emotions.
Thirty seconds to forget that he’s a young man with feelings and emotions and a heart, and he does it. It’s thirty seconds to convince himself he’s a monster and this is what he does, and thirty seconds to turn all his anger and rage and hatred inwards and then outwards again, that last distraught raise of his brows before he screws his eyes shut and reminds himself he’s a weapon and this is a war and then a pure and blinding fury takes over.