This is the size of a support's ego(true story):
Enemy team has 4 channels. Everyone on their team is channeling and about to win the team fight. Soraka, the support, gets a 5-man silence interrupting all their channels. Jinx gets a triple kill and the rest are killed by the others.
"Nice goin' Jinx!"
"WOO! GO JINX!"
"Our Jinx is god."
Soraka: "... gj."
^true story right there^
That, my dear friend, is the size of a support's ego. The size that allows them to take no credit for a team fight won solely because of them. I will tell you right now, I have never once in my time of playing League seen a support that tried to take credit for a kill, or multi-kill, or team fight won, without it given to them. I've seen supports applauded for it, the same thing there with what happened with Jinx, but truthfully and honestly, I can't remember a single time a support ever said, "that kill was all me."