I understand why no one plays support

So, I was getting the Team Builder support icon and to my surprise, I had very good team mates as Morgana, Nami and Thresh. Then what happens, the bad adcs start to pop up. And I don't mean bad as in unskilled, I mean toxic. The first three plays were very rewarding, but the latter two, with Janna and Karma, were a pain.

With Janna I had this Tristana that started trash talking me because she started without me and by the time I got there she died, then she says "if I ping, you go" as if I'm supposed to support her and only her and do everything she wants. We ended up losing with no chance of turning the game because her and Zed left the game after three failed attempts to surrender.

Then the last one with Karma, I killed 3 minions with my Q while I was harassing (I literally had only 3 cs by that time) and Graves basically tells me to stop farming or afk, after awhile he recalls while I was harassing the enemy team and instead of simply recalling he spammed pings for me to leave too (it was warded, there was no jungler in sight and it was completely safe). I eventually left lane and started to roam support the rest of the team, cause he was just unbearable.

Now, my point is: playing support is actually really, really, awesome. But toxic players really ruin it. The first three teammates I got acknowledged my help and that I saved them, the others didn't say a thing except complain, even if I got their asses out of death. This toxic behavior really makes it less fun to play support in SoloQ because you never know what kind of douche adc you're gonna lane with, no one wants to be blamed for something they didn't do and the support is not your slave.