#1
So, i just got a Digitech metal master which i'm running through my fender frontman 15g with a Schecter omen 6 extreme but if i go with the High or Morph knob above 6 It cuts right into my ear drums. So i guess i need a better amp to fully experience DMM distortion?
#2
You're probably causing the amp to clip. The amp is your biggest problem, but cheap effects don't usually sound that great. Be sure that you're not running the pedal on the gain channel.

Also, the high knob essentially accentuates high frequencies. Since the human ear is sensitive to high frequencies, I'm not surprised you don't like how it sounds.
#3
those metal pedals can get pretty edgy-sounding. that might just be how it sounds at that setting.