Quintus.......

I see your point, he simply did his duty. And perhaps there’s nothing he could have done for Maximus. However, it kinda depends how far they go back. Maximus was an honorable man, who fought many battles for his army. Quintus must have known what went down, and that Maximus was not only doomed, but so was his family. Based on how the guards were ordered to take him out and execute him, maybe he could have pulled them aside and arranged for him to escape. He certainly didn’t show any blind allegiance to Comodus once he was being bested by Maximus. He “did the right thing” and denied Comodus a weapon when commanded to provide him one. It would have been nice if he had followed his conscience and done the honorable thing before Maximus’ family was slaughtered.