Can you keep premade against premade a separate Q.
Virtually every game where I've had terrible players who are toxic as well when told to wait for jungler help and stop engaging the lane they've fed 3 kills to hoping for a different outcome has been comprised of 3-4 man premades.
Just keep this garbage in their own realm dealing with other premades. SoloQ should be actually soloQ.
You get spam pinged as jg for being alive when the bot lane support is 4 deaths in by minute 6 and the adc another 3 deaths on top, and when you tell them to stop pushing the wave out and getting engaged on until their jungler arrives to help, you get told to gtfo.
Just quarantine these people among themselves. They are clearly playing the match only concerned about their group's enjoyment and no one else's. It's like a 15 year old boy among his friends, it's a climate begging for these people to behave like jackasses to amuse their friends.