I think, the most debatable street is preflop. Yeah its only a min-raise, so you are getting good odds, but actually your odds are worse, when someone else has called, because now 3 players are fighting for the ante and SB rather than two. So I actually dont think, its weak or tight at all to fold Q2 offsuit, since its a completely unplayable hand. Its not suited, its not connected, and if you hit a Q, you have major kicker issues. So its like a 70 year old prostitute offering you to get laid for 20 dollars. Yes its cheap, but probably you should still say no
Postflop I would have played the same way, you did. You cant fold the flop with bottom pair and a decent flushdraw, and when you turn trips, you are pretty much committed to the pot. Its just a massive setup, and for sure UTG should not fold a flopped flush. Its very difficult to flop a flush, and its almost impossible, someone else flopped a flush as well, even though this time it did actually happen.