Support Main Definition
I am not skilled enough to get kills my self so I have to be a door mat for my team. 
I am not skilled enough to get kills my self so I have to be a door mat for my team. 
I looked it up in the Merriam-Webster dictionary and it says something else;
Support main: My carries are not skilled enough to survive on their own, so I have to block skillshots aimed at them because they can't dodge, provide vision because they overextend, stun the enemy because they can't hit a moving target, and take the blame for his death when I roam or recall and he pushes lane all the way up.

Cool shitpost.
I don't like facing Thresh but over time, I've come to appreciate the support role more and more.
Because support champions aren't generally based around doing damage, they can have a lot more unique and fun mechanics in their kits.
That being said, there are some I just hate facing. Thresh, Blitz, etc.