Forgive me weathergirly, but would you commence your descent, without capture of the GS, or the LOC for that matter. Particularly when you were very aware of the high ground to the North, and that the procedure takes you over it, hence staying at 2200 until capture of at least one of them.
Sorry, this was classic spatial disorientation, with CFIT. Call it overload, call it what you like, but I feel this is what happened.