Are you feeling stuck in trading due to your strategy? The person you are thinking their strategy is working, may have a strategy that is not sustainable. While it is important to be able to unlearn and learn something you should be able to understand also sometimes that your strategy is not working because you have not gone deep enough in the mastery of it.
We can do several ways to assess the strategy not go well and if it is felt not to meet expectations then we should be able to test the location of the error. Every trading strategy is the same but not everyone is suitable for use because sometimes the strategy does not go well when implemented. It could be not the wrong strategy but a person's way of understanding strategies that are not able to run properly or in other words mastery of the strategy that is not correctly understood.