Why support still stinks
I have had way too many team builders in the last few months where we had to wait 10 seconds for every lane to fill and then an additional 5 minutes for a support to be found. It is always the last choice in my ranked games and in blind pick. Support is simply a role that the majority of people don't like as much as other positions.
There was a brief time at the beginning of the season where support starting items were strong and everybody seemed happy to play the role but things got slowly nerfed and many people lost interest (see feral flare and farming junglers.) The support items need to have a gold income buff so that you can actually build something on your champion other than the completed gold income item, shoes and sightstone in the first 30 minutes of the game. Plus a lot of people are apprehensive about laning with a partner that may be horrible or super angry so they tend to avoid it altogether.
People are going to say "well that's too overpowered." I say that's fine to have it be overpowered. Sometimes you have to make things overpowered in order to make people interested in doing that again.