Just to get involved in discussion, I am also curious about this hand.

I do have some thoughts on it though I am not a pro by any means and hopefully
we can create some discussion to help my train of thought. (first post here)

So if he wasn't 3-betting much vs UTG / MP raisers, I think flatting here is okay considering
a lot of the time he would be having 88+ or 99+ and AQ+. He would fold the bottom end of his range to a 4-bet so I do think it is the better option IMO, plus i think most villains ranges are wider than that. You opted to flat so lets look at postflop.

The flop is strong obviously. Especially if you believe he has a tight range. Since you only decided to flat call pre-flop I believe it is an advantage in this position. You only lose to AA and JJ and maybe AJ. He may be putting you on TPMK or a mid PP as well.

Hes going to CBet a medium amount of time considering your range has got A and J in it alot.
If dont like C/R because the only thing he continues with has you rocked except AQ.
So as played I think C/C is better then C/F or C/R anyways. (someone help me if thats incorrect)

Turn play is interesting because I think he could potentially have KKQQ101099 and have a Diamond some of the time he feels he can bet into you to get you to fold.

On the River you need to call $60 to win about $130 or whatever was in the pot. So in order to turn a profit you need to win 1/3 of the time. (lol I think?.. please tell me thats correct).
Based off his hand ranges I think you win more than that so I think a call is fine.
I dont really like it too much TBH so I think 4-betting is just better so you can avoid these super difficult decisions, but you got him to bluff his stack off soooooo someone give me a reason to not play the hand like this so I can understand why my gut tells me 4-betting is better.

This is pretty villain dependent. A good player would play his value hands (AK, JJ, KQd, AJ) like this and the right proportion of bluffs. Bad players would probably try and get tricky with their really strong value hands and fewer people 3-barrel bluff when everything misses on the river than people think imo (especially at the small stakes). You only beat bluffs or chop with AK, but can villain turn KK, QQ into a bluff and is he doing it enough of the time to the call him here?

Im not sure about the river. I dont expect vilain to valuebet with worse in this spot (maybe AQ ?!), so you're probably bluffcatching. The problem is that I dont see many good bluff for him otr since the flush got there ott (a lot of his non value hand are FDs) and im not sure whether or not he'll 3barel bluff with KQ, KT type hand.

On the other hand, you are almost at the top of your range and vilain can 3barel to try to make you fold your PPs and weak Ax hands. He doesnt need to bluff many combos to price you in on a call imo.

All that being said, I think I'd call his river bet.

This is probably meant to always be a call because villain is probably meant to be valuebetting AK in which case our hand is better than a bluffcatcher. It's possible though that villain can't vbet AK here in which case this is just a bluffcatcher and we can call or fold depending on how much we think he's bluffing.