Yet another vein of shitty behavior that has been grossly incentivized by this entitled community and needs to be stamped out. Entire teams will just ragequit over the support doing ANYTHING, and will scream at the top of their lungs until they puke blood while breaking everything within their reach if the support does anything even remotely competent.
There should be an absolute zero tolerance for this kind of behavior. Any time I get a kill under ANY circumstance, the entire team will just go active AFK in the fountain and scream obscenities at me and blame me for making them lose, because somehow the support is magically able to affect lanes they aren't even in.
It's no wonder the game is hemorrhaging supports at an astronomical rate if this is how you treat a support with any degree of initiative.