Why so much flame in normal games!

Today I played a normal to relax after ranked games try-hard.I tried a not normal build on varus (lethality).For some reason my team started flame me like try-harders in ranked game but IN NORMAL GAME.They flame my family they hoped me to die from cancer in A NORMAL GAME.I told them if you lose will nothing happend cuz its normal but they was try-harding and flaming so much.

This game is a fun game but this toxic community makes the game not fun to play and also make you hate the game because they make you mad!! (sorry for bad English Hope you catch my meaning)

Thank you!