Here is an exercise: look up your games from 1 year ago. You will find that the players who were bad in your games are 2 medals lower and those that were good are 2 medals higher than the rank they had at that game.
Now, the ones who dropped far down did not affect you games as much as those who were much better. Therefore, smurfs are worse than account buyers.

People like you crying consistently about smurfs and acc buyers. Like the 1000000th post is gonna change anything. You are way more annoying than a smurf in 1 out of 25 games