Why do people freak out so much about normals?

No I don't mean this as "i intent fed and trolled then had a guy get a little tilted at me" no i didn't do very well as nidalee cause im tired af and just wanted to play a game or two. This guy let me have jungle in champ select and i thanked him. I was a nice guy the whole game. Didn't flame at all, complimented people, but i just didn't do very well. This person flamed me from 15 minutes on and even spent most of the post game chat insulting me, egging the enemy team on just to insult me, and even friend requested me just to spam me with more hate messages (it was pure comedy).

Why do you flip out this much normals? It's just normals dude... you shouldn't get this angry about it.