He doesn't consider himself to blame, not for her finding out or the fact that Boulder decided to send more of their ranks into the wolf den. He just knows this is a really shitty situation to find out after the fact.

"I dunno how many you killed or anything, I just know who showed up. You probably took out some of 'em, right? And like you said, ain't a big loss in the grand scheme of things. You had a job to do and you did it, so don't.. beat yourself up too much about it?"

The thing that mattered most to Flagg was probably that Nadine was with him. He understands her anger, but Larry got-- not what was coming to him, because Lloyd decided that they'd been wrong and he didn't deserve what he'd been dealt, but.. he certainly got dealt a shit hand.