Losing a little faith in humanity

So i played a normal game with someone a while back, and we had fun, so they friended me. Well they invited me to a game, and all 4 other members were in a clan, i thought that was cool, everyone seemed to be talking well. I get into game, playing a little bit. 10 minutes in i realize i'm not getting helped at all even though mid is 100% dead locked. Well turns out they were on discord. So about 25 minutes in after we start losing, maybe closer to 30, don't think it matters, i start saying something. Well they never even asked if i had discord, but here they are, telling the all chat that i'm being a salty whiney baby about it, because we're losing. They even said they asked if i had discord and i said no (Which never happened, i was never asked.). Before we even got in lobby. i said i didn't want to play mid, but i would. (I hate mid). And one of them said i was being salty and butthurt about not being able to play mid...

So a lot of backwards things happened at the end of the game. we lost btw. I held mid for 15 minutes as GP v Akali with no help. Point is. i needed to vent, and this just ticked me off because of how much happened. Who invites somebody to a game with their friends they probably know personally, doesn't invite them to the chat and effectivly cuts them off from the team basically making it a 4 v 5, and then proceeds to insult them out of nowhere while flipping logic to the whole other team as well?