Hey Trent,
I would call that river bet every time as well. I feel like I would 3-bet it 90% of the time unless I knew this player well and had some specific reason not to, with the understanding, of course, that player will sometimes be dominating with this line. He’s playing it really “big pocket pair” so what can you do.
With you holding Ad and Kd on the board it seems his range is really limited here. Best case is he’s on AxAx, KxQd, JxQd, QxQd or the dream hand QdJd. Would this player 3-bet here with all of, or any of these hands? In the SB?
It looks like he played this pretty transparent, so I guess if you were the nitty-est player ever you could find a fold on the flop, but what fun would that be and you’ve flopped nearly best case scenario for your hand so bailing seems out of the question. Most other flops and you could get off this easily. I think I would have gotten stacked 9/10 times here, so chalk your flat on the river up to good play.
Cheers!