[He's quiet for a second at the apology. It might not be the first time Cas has apologized for shit- maybe this particular incident, sure, but not ever. Still, the words coming now, not at the height of a mistake, not prefacing the request for help fixing it, not desperate, just... sincere. They mean more, somehow, than they ever really have.

He breathes out, and a lot of the resentment he's been harboring goes with it. Not all of it, and it's by no means even scratching the surface of the shit they have to deal with, but it still.... means something.]

It's not your fault.

[He mutters finally, voice quiet.]

You were doing what you thought was right. You were doing the best you could at the time, and-

[A beat, where he chews on his words, huffs, and finally reluctantly admits:]

I'm not exactly the best communicator on the planet, either.