Agree with a lot of comments so far. I believe his flop bet is more heavily weighted towards weak made hands (flushes, sets, straights) than strong draws (Ad, 5d). Agree that we aren't doing well enough against that range to GII on flop.
On turn we improve a bit equity wise, but I don't think we are folding out high equity hands, so I don't see a lot of downsides to flatting turn unless he has AdX precisely.
River ($1100): 2d3d4d 6s 3c
V shoves for $1080