Why support players cannot carry?

First, sorry about my bad spelling and grammar.

Playing support ( ) now cannot help you climb up in low elo.

You have an adc which does not know how to shove lines and fight while his teammate on low health (under own towers) which cannot provide any help in 1 v 2. (I mean, they have both sums and you try to flash and kill one? Also, miss the auto?)

You have a jungler which never come bot, and help a top to win instead. (I mean teemo have no teamfight abilities compare to renek in late game, also good renek knows how to low teemo health bar and ult-flash-W-E-Q-E )

You have a mid which might feed as 0/5/0 before 15 mins, or he could not stop his opponents to roam.

You have a top (did not mean teemo) which cannot even farm in the lines. (Push the lines till death and did not know how to shove)

When I do cc support, adc cannot follow up with damage and end up dying (in plat IV); when I do damage support, we win bot and cannot win in teamfight because of there are always feeders on your side did not know how to against his opponents or 'I goona go kill this guy no matter if their jg around'.

Maybe people are saying 'it is just a video game, and do not be so mad about it'. People play rank solo/duo to show that they are the best, not show how toxic they are.

Right? [slayer-jinx-catface]