Underlying factor is “loss aversion” - or acknowledging that the decision you made is wrong or that you made a mistake. It’s human nature to want to be right.
While mathematically even with a win rate of <20% you can be profitable overall it’s humanely impossible. This is why win rate is still very important for your sanity, if you’re trading manually.
Mine problem was very simple, not accepting the loss/negotiating it, which leads to spiral of wrong trades. I know my strategy works, but it never fully gets to show its results because compulsive/greedy trading overcomes. I recognised the problem over large experience/data. I recognised that compulsive trading never brings the success. After that, controlling compulsive behaviour already become easy. But it needs framework, I made simple rules like every trade with hard sl, immediate termination of session if one compulsive trade or emotional mode shift, never averaging the loss, trading termination for a day if 3 back to back losses. Building Trading psychology not means you don’t having compulsive thought, it is your recognition over it, and responce not reaction.