Clear 3bet especially vs a fish who doesn't fold vs 3bets and has a wide range

BB is a fish too, but his calling range isn't wide, at least from my small sample. He folds vs 3bets everytime and this time he's calling a cold 3bet

I got good equity vs BTN's range given the fact his range is wide and weak. Probably I would cbet 1/3 vs him and reevaluate OTT. I wouldn't expect a ton of folds tbh, so the turn would be difficult to play anyway.
In this specific spot, I'm kinda lost. I see myself getting called a lot when cbet and get bluffed a lot out of the best hand