The mountain in your dream actually corresponds to the difficulties in your reality. Simply put, you are actually crossing some difficulties in your reality.
The hillside is 90 degrees, and there are several possibilities. Maybe what you are facing is very challenging and difficult. Besides, climbing mountains consumes a lot of physical strength and is also a test of psychological will. Not to mention this angle.
You are faced with a dilemma and he is constantly consuming your physical strength and will, making you feel exhausted and unable to support.
That's probably what your dream means. If your user name was not the same, I would have taken you for someone else.