premades

So .. just got put in with a 4 man premade. We were winning, but they kept diving in and dieng for no reason. I ask them to stop jumping in for no reason, and just finish it, so as we are in the middle of taking the nexus (mind you entire team is aced, nexus has maybe 3 hits left) They surrender. And say "fuck our jinx" ....then they all 4 report me because they're premade? And the opposing top laner decides to honor them for surrendering, and report me for not? How is crap like this even fair? You want to know what makes people be toxic? Dealing with shit like this.