brake pad problems

ok this is really making me mad my beatraker brake pads work awsome the worked for like a year perfectly until i went mudding in my friend's yard and i was riding over to the hose to wash my 4-wheeler and when i hit my front brake started grinding badly. So i thought it might had been dirt between the rotors and pads but after washing and and i was driving home it was still grinding so after i got home i took the tires off and found out the the pads where completly gone and the metal part of the pad was broken in half and the other one wa just torn up like crazy so i bought more they worked fime one week later went mudding agian there not really thinking same thing happend also my friend arctic cat sufferd the same prob but his rotor had huge gashes in them anyway i was wonder if there are better brake pads where out there or just don't mud in his yard and where there are cheap pads cuz i am not spending 70 bucks again any help will be apreciated...... i know i wrote alot but i was bored.