Im not sure if anyone will agree with me, but I find support champions most cancerous to deal with

Maybe 

Maybe 
Being cancer is like the whole point of support. You get that in exchange for lack of damage, autonomy and gold as well as the burden of being the teams bitch, lol.
I stand by you 100%
(not really cancerous, just really unfun to play against)
(only if they're really good)

Most cancer NA
Fuckin pornstache
A good one trick
is like the most cancer you could get
This is coming from me A
main