1/3 very deep hand

Hey all, have a hand I played recently at 1/3 I wanna go over.

This is a buy in to big stack game so I’m sitting on around $750-780. Been at table 20 min- ok utg straddle, I’m utg+1 and call $6 with 10-8dd. Mp makes it 25, all folds and I call. I know I shouldn’t prolly flat straddle from ep etc but yea I did. Flop 9-7-2 with two diamonds. I check and villian cbets $33. He has 2k in front of him- he’s a regular I have played against on this trip- seems like a good poker player. I make it $125. He makes it $450. I ship. He calls, he has 77 and we don’t improve.

Is this just standard? Like am I ever supposed to take different line on flop? I assume no it’s ok to get it in. He was a solid player that was prolly TAG mawg. He seemed more regular bc I saw him buy in for max a few times at this game which I feel most people that are just recs don’t do. I feel hand- it’s fine to get all in on flop bc we have all the outs but yea we run into sets a lot and overpairs sometimes. Thoughts?

The preflop action might be bad. Idk if calling straddle is good here utg+1- tables tend to be tight with not much 3! Or 4! Light.