If you think it isn't worth going support because you are leaving it to others to win the game for you, then firstly you definitely need to learn how to properly play full support.
It isn't just that you get no items, buy wards all game and let others farm, there is so much more to it. A true full support is who makes the plays and creates the atmosphere for your other heroes to do well. You need to be effective at all points of the game with whatever means you have. It is a high impact role and makes a huge difference in any level of play, above absolute tosh tier.
Exactly. I hate to use the N word but people who don't understand/appreciate/actually play support roles are just noobs, there is no getting around it.