50 has a massive veil of misconception wrapped around it. 50 means that you played enough games and in succession, won them ,be it by chance or by skill. If a player is 50 this doesn't actually mean they are capable of winning every game, no scoping you from across the map or throwing plasmas which bounce of 20 walls, go through a man cannon, get hit by a gravity hammer and end up on your face. Everyone has their bad days and you should really see a player as equal regardless of the number to the left of their name.
Also, being 50 is serious business and a lot of them will shout abuse at you in order to gain some plasuable deniability about why they can't perform ingame and beat you.
Such is life.