why are people so mean for no reason in this game

Okay so i was in blind pick yasou against yasou i won lane destroyed lane even then my akali jungle feeds 5 kills i had 600 ping my jungler fed 5 kills in a row my laner roams after i ping mia he picks up a quadra kill with my bad internet connection last hitting was hard barely possible so he came back to lane with a around 35 cs advantage and 3 kills i out duel him 3 times then my jungler feeds him 3 more kills trying to get fed off him, now my mirror match laner with the try-hard project yasou skin has a massive lane advantage and a level he has an entire IE over me and i kill him barely with my ignite saving me then next time he comes back and kills me and my jungler starts off THIS YASOU IS TRAshhhhhhhhhhhhh then my enemy laner goes LOSER YOU LOST LANE after i dueled him and won countless times i was trying to be a good sport saying good job and close one and stuff like that and then i lose one and both my jungler and my laner go into a huge flame war on me that goes into post lobby about how trash i am after i spent the past 20 minutes with 500 ping beating him and complimenting him the real question is.....Why were they mean to me when i did nothing but compliment and help? Why were they just jerks for the purpose of being well jerks?