Exploration is key. Try different routes and inch your way to victory. If you want to beat Alpen Ghoul, you’ll have to earn it. It’s one of those games. Your playstyle is up to you, but I recommend staying crouched, keeping your flashlight off, and searching around the mountain slow and safe until you’re more familiar with it. Once you have an idea of what’s out there, crank up the speed and aggressive sliding. Sliding is the fastest way to move.
Beyond this advice I can't help you. It's up to you to pull off a win. The mountain is cruel and there is no easy way to beat it... but it is beatable.