4 man premades

So I just got out of a game with a 4 man premade team, normally no issues at all, it's normals its whatever, they pick a darius and teemo bot lane, along with a cho jung and a ren top, I pick zed because I just feel like playing him, so anyway we get into the game for the first 10 minutes everythings fine laning phase is going well for me and ren but bot lane has already died 4 times between them, again low elo doesnt really bother me, it gets to 15 minutes in the deaths are up to 9 between them, and I have a ziggs in my lane trying to kill me but nope not today, so he roams botlane, I ping him mia like I should and even told them in chat care ziggs roam, now at this point they've been non stop toxic towards me because I guess 4 man means they can get away with anything, so I ignore them for the majority of the game, I told them a few times to just shut up and focus on the game because we can still come back, its not over until nexus explodes right? Yet again non stop flaming the entire time saying i'm just feeding and i'm doing absolutely nothing it's just absolutely ridiculous at this point because guess what even if I have reformed and not been a toxic player, even with 4 accounts banned guess what i'm still going to get perma banned because the insta punishment is just absolutely ridicilous and if I say one negative thing at all then bye bye my account, riot fix your shit.

TLDR; fuck 4 man premades, fuck the insta punishment system, and fuck this stupid ass company who refuses to do anything to fix it.