Why are normals more toxic then ranked for me?

This is 1 in about every 5 games

Teemo afk so im solo lane thresh I am losing lane and dying a lot so i go mid to support morgana Morgana gets pissed off and lets me die whenever i try setup a kill for her Rengar calls me a dumb shit constantly for no apparent reason. Karma harasses me in all chat. Rengar gets 4 people to report me for "trash" I try to be positive and say gj everytime he gets a kill and he jsut says stfu to me.

?????