That wasn't your fault. It's his for letting you put your faith in him and exploiting it to his own advantage.

[He sighs, wondering what the hell the Admiral was thinking, really, to keep them all cooped up like this - was it really beneficial to Felix to have Gaius here? Or Morgana and Arthur? Or Erik and Wanda, or even himself and Erik, if we were really being honest.] What were you hoping attacking him would accomplish?