Ranked is RNG and grind
Random chance that you have someone who is comparatively worse and will feed the enemy team to oblivion. and an equally random chance that the enemy has a player that sucks and the same thing happens to you.
The game is never decided by your skill alone, it is relative to your team + the amount of times you are slightly better then the opponent in the same role. Your involvement is, mathematically speaking, only 20% of your team- whereas the other 80% is decided by luck. matchmaking is only 'balanced' because you and your opponent have an equal 50/50 chance of having a retard.
remember this is taking into account the fact that the law of probability is GENERALLY correct. But 50% every game is always 50% and anyone can sit on the unlucky side with feeder/afk/baddie every game.
So i guess its still fair in some sense, but in essence its nothing but a torturous grind whichever way you put it.