Incomprehensible...spoilers

I am going through a phase of watching old "horror" films and was excited to see this based upon the mostly good praise it had behind it and the idea of a decent Yeti story. It also stars the great Peter Cushing so how could it be bad? The story was not decent nor straightforward and was mired in predictable plot devices and inexplicable supernatural occurrences. I just found it to be a challenge to watch, all the while hoping it would get better and redeem itself. Its a rather obnoxious film from the heavy handed music score to the loud mouthed Friend character and a group of supposedly experienced climbers doing a bunch of stupid stuff climbers should not do like yell and scream and shoot off guns, all of which will cause avalanches. They are under-dressed, over-equipped and doomed to fail. The strangest plot-thread involves supposed altitude sickness...or is it. Are the Yeti's playing supernatural mind games with them or is every man in the group losing it? I dont know, I couldnt figure it out and its never really explained or hinted at even though its a big part of the story. Then there is the key phrase uttered by the Lhama, "The yeti does not exisit." Well clearly it does they shot one dead, so what does that even mean? IDK? A lot about this movie makes no sense to me and I am struggling to find even one good thing to say about it... Oh did I mention Peter Cushing is in it? He's good.