The reform system failed. + New idea
Why does riot think that banned players will quit or be reformed? they will create another account and play like varus' quote "beware a man with nothing to lose" and they wont reform at all.
How about isolationg such players? i mean , they can have their account but they cant play with friends nor que up for rankeds, they will only play with and against other flamers until their behaviour has improved to the better. THIS is what true reforming is like no "you, fk you, you are banned now forever by a bot, ty for the money tho"