In the hand, you have an UTG raise, and an UTG+1 call. There ranges are super strong and yet Brad only raises 3.66x. Mistake #1 IMO. He's playing ABC poker here and should be punishing the crap out of the Moby Dick.
UTG is a "maniac" by his definition so I'm going big, especially with two players in the pot. If UTG is calling, then we can basically almost always count on UTG+1 to call so I want to diminish the odds UTG+1 is going to get a bit more than usual. Maniacs don't tend to care what the raise is they want to see the flop. His open of 15x basically confirms so I'm going $400-500 and if this is a really special whale, then you could go 1k and still get called.
Flop Brad bets almost half pot here. I think this is mistake #2. In a 3-bet pot vs. 2 players I'd prefer more of a range bet here of around 1/3 pot. It also allow us to fold if UTG jams, UTG+1 jams then maybe we can find a fold (we didn't get a read on UTG+1 so that makes a huge difference if he's involved).
However, this is where Mistake #1, compounded into mistake #2 as if I'm making it $450 to go PF and get 2 callers now that pot is ~$1400. With an SPR of 2 I'm basically committed to anything barring an AKT all black board or something. You're at the top of your range here so your going to get punished, especially by a maniac at these stakes if your folding out the top of your range on a 2 flush board.
Either way, this hand involves a lot of variance which doesn't bother me if I'm playing in the game (otherwise I'd leave), so money is going in and in this instance maybe I get my Q.