Sweet Baby Jesus! Nerf Mundo!!

I'm sure that a thread like this has already been created, but I really don't care. I just finished a game as Kennen in mid lane, and everything was going fine, until I remembered the enemy team had a Dr. Mundo. It took all five of us piling our abilities onto him to get Mundo do freaking DIE. He regens health just too dang fast. It isn't natural for a champion to solo tower dive you (When you have full health), get pelted by two Nexus turrets, and walk away with almost full health. Mid game he was regenerating 50 health per half second, late game he was regenerating over 150 health per half second. Whatever God forsaken ability that is over powered and created this Champion from the depths of hell, nerf it rito. Mundo currrently has an average ban rate of 83.8%.... thats insanely high. With a ban rate that high, and a champion as broken as this, rito might as well say "F- - - YOU B - - - -!!!" if they dont nerf mundo, cause he is way too broken. Good luck surviving blind pick summoners.