You’re unprofitable because your decision-making skill sucks.
Not because the market conditions are “hard”, not because prop firm rules are strict and surely not because the strategy doesn’t work.
Take responsibility.
First you tend to oversimplify everything.
Then you’ll start to overcomplicate what you should be doing.
Finally, you will reach a point where your knowledge and actions are clear.
This is simply a grow in understanding. Submit to that and your journey will be far smoother.