Pre: I'm folding here vs an UTG open, even vs the min raise.

Post flop I think you played the hand perfectly then, I think I play it the exact same, including your sizings.

If he's weak then it follows that you're fold equity might not be as much as you expect. If you think he's not very good then generally it's better to widen your value range rather than bluff range. Did you have a read that he's opening too wide from UTG and folding too much?

As played I like the line. He can have worse pairs with a diamond plus bare draws.

I don't mind the post flop line, but it's super hard to justify the preflop play. J7s is just so weak when it comes to interacting with your average UTG player even if he's on the weaker side of the spectrum. I'd need a lot of info to ever consider making a play with this hand in this situation.