I feel your pain, I'm not super short at 5'10" but I get that problem as well. I just got some rip curl pants that have a snap in the back attaching like halfway up my calf to hold the pants up from my heels. And had foursquare pants with a heavy duty fabric around the bottom hem which held up great for like 5 years of getting walked on.
Seems like the tend for snowboard pants is to have a bunch of pant scrunched up by your boots these days. Maybe look into non snowboard brand pants like Patagonia or north face
. Or see if a tailor can alter them for you.