Toxic players like to form colonies, apparently. Experiences?

I played this normal game recently, new matchmaking draft system, and I ran into this premade group of four. Two shared a group name, and they didn't type anything in chat, so I assumed that they were using skype, or something. I was the adc as Lucian, and i had a thresh support. In game, top ekko did well, bot was well matched, as I faced an MF and sona, and mid azir fed the enemy ahri and diana to oblivion. The support and mid suddenly started actually flaming in chat, while the jg was completely apathetic, and just sat complaining. It was almost like they were trying to appeal themselves to me as the guy who's right. All of them generally seemed like awkward, troubled people, so I just dealt with it. Sometime during the game, I started to tilt, and made two stupid deaths. Eventually, I guess they met a consensus and surrendered at 20, overruling my one vote. TLDR: These premades sometimes make concentrated pellets of toxic-ness, so I don't like em. Did anyone else experience something similar?

I've been unranked for a long time, yeah. I've gotten sick of it, so I just started my placements. 3/3 tho