100% a fold when you get 4bet, QJ is going to be dominated so often when you call OOP.

When you raise their flop cbet and get called most people are going to turn up with an overpair.

Was the player a fish? If so, you'd be better calling pre flop with QJ then 3betting, 3bet hands like AJ AQ for value instead of QJ which can be easily dominated.

Pre can be a call or 3 bet depending on reads. Once you get 4 bet it's a clear fold.

As played it's not a board I expect most players to bet their air on. If you want to bluff the flop I would say shoving is best to remove all possibility of villain assuming he has fold equity later on, but it's not a good spot you've got yourself into.

Pre: I definitely like three betting here vs the BTN open. However when we get fourbet we should be folding, there are nowhere near enough light fourbets to make continuing here profitable in the long run.

Flop: When we call and we hit a flush draw we can never consider folding, otherwise we are making the call of the fourbet absolutely awful. Rather than raising here I probably just ship it to maximise our fold equity vs his unpaired strong Ax like AK etc.

Turn: We've played the hand in such a way that no options here are good really, I would expect the chances of us being ahead here to be almost zero and we have absolutely no fold equity either, we have also built the pot large enough that we cannot check fold. I would probably lean towards a check here and hope it goes check/check and then jam if we improve to a flush or a pair on the river. If we do not improve then I would be check folding in this scenario, however I think the chances of seeing a free river card are slim to none.