Which type of players do you hate most?

Players that doesn't capitalize on obvious advantages, for instance when you kill 4 of their team and your entire team is left alive. Your teammates rather push mid tier 2 and top/bot tier 1 or 2 rather than having a free Baron Nashor, or drake for instance.

Or people that ward their lane/area, yet can't seem to avoid getting ganked, or just not getting out of lane etc despite all of our team spots the gank in their own ward, and ping like madmans. Yet they constantly die and keep on feeding.

And lastly but not least, FEEDERS. PERIOD.