A little story as a final example, make of it what you will. X plays QoP in mid, Dire side, his team lanes 2-1-1 and the enemy does the same. Enemy mid is Pudge which is fairly easy for X to deal with. Few minutes in X grabs a haste rune and ganks the enemy offlaning Windrunner. X is happy with himself, but doesn't pay any thought to the conditions of his gank. Before, Windrunner was effectively kept off XP range and was still at level 1-2, and their carry had perfect lane control. When X ganked, they took the hero kill and screamed a creepwave for some extra farm for good measure, and hasted back to mid without staying to damage or push the tower. In the aftermath, Windrunner finds herself getting easy XP and gold from the pushed lane, and it takes minutes for X's team to get the lane back under control.
Later X finds another rune in bottom and hurries to gank the enemy bot lane with apparent ease. He gets two hero kills but the enemy jungler shows up to kill his teammate, but he rushes back to mid. This goes on an on, X's QoP snowballs a good deal with the fast early gold. X hops from lane to lane, decimating heroes and creepwaves alike. This continues until enemy team manages to successfully defend a bad push, and X gets killed with several teammates. X is pissed at his team, perhaps for whatever they did wrong in the fight or to their carry who had stayed to try to farm (which they knew before trying to push) and proceeds to go on a farming overdrive, clearing two lanes and jungle while trying to get his next item. Eventually the space the enemy team got allows for them to grab some more farm, and they realize X represents a significant portion of his teams net worth and decide to try and focus him. This strategy brings them victory. In the end, X realizes he is 14-3 while rest of his team did a lot worse, he has more farm than their carry and even the enemy heroes he ganked have more farm than his supports. X concludes his team is trash, enemies don't deserve to win against him and matchmaking is shit (or he is too good for it.)