LP system

Guys I think that LP league system need a chage. This is one example why. Istarted searching for the game with 21LP and i won a game before that after 4 game loses in a row. The game started pretty good for my team, we got first blood, first tower, and all looked like an ranked win. And then in like 40 min, our mid lane (zed) went AFK. Five minutes later, we had 5 dragons, a baron, 2 enemy inhibs down, no enemy turrs, open 3rd inhib, and we lost only 2 turrs (on mid and on top), and we could finish that game for 10 min. Our mid laner didnt back, and we lost after team fight which went 4 for 2 for enemys. And then, after a 55+ min game, which we played 4v5 and lose, i lost 21 LP. Thats crazy. When u play that long game u cant lose 15+ LP in my opinion, and riot need to add something for an AFK team they cant lose 20+ LP, its really not fair. THink about this guys :D

Pictures: http://prntscr.com/89wz4u ; http://prntscr.com/89wz9r

Thanks for time