Most annoying support?
Keep in mind, this isn't a rant post.
Basically, anytime I've ever faced a Leona support I've always been zoned out of CS, forced to farm at tower until the enemy Leona hits lvl 6 and proceeds to tower dive every time her ult is available. Just about every game I've played against a Leona support I've always lost laning phase UNLESS I'm able to get ganks from my jungler.
There has only been a few games however that I actually lose the game due to this, as I tend to split push and recuperate from the early slaughterfest that is Leona.
So, what are your most dreaded supports, support/adc combo that you've gone against?