You want to know why nobody wants to support anymore?
Because the best champs there are boring as hell, and there's no reason to run ignite anymore.
First, the best and second most popular support is Janna. Janna is nothing more than a walking cuck button. Anyone that goes in gets blustered away. Her E is just an AD steroid and HP for her bot laner. Not much interaction. People attempt to ail this lack of solid support champs bottom by playing mid laners there. Brand and Zyra are also amongst the most popular supports. People only like playing them because they do damage, but also because everyone else sucks OR isn't fun.
Ignite just doesn't get run anymore because
is the most broken summoner in the game. As a result, it just seems like there isn't much killing between the bottom laners, at least 2v2.
Now you could get into the fact that jungle is broken currently but I believe that the crappy array of supports that are good currently and the fact that exhaust is so stupid broken are the primary reasons nobody wants to support.
Also supports are like 3 levels behind everyone at all times, so their stats are pathetic compared to other people.