I do not mind playing against premade teams...
... what I DO mind tho is that some people get carried WAY to high by their friends - up to a level where they just cannot compete anymore if they are not with their team anymore and play solo. I'd like to call them "Droppers", because they drop in rank really fast (because that's the thing boosted players do usually when the boosts ends), but keep dragging the team they are playing with them every game.
That games are fun for no one. The enemy team gets a free hollow win because of a 0/10/2 feeder, the feeder gets stomped hard and feels brutally useless, and the losing team has to deal with the fact that no matter how hard they have tried, some noob ruined their game hard.
Not to mention that this is pretty much the perfect breeding ground for toxic behavior...
We've had this problem before with traditional ELO-Boosters. But usually they get boosted once, drop down, ruin a few games, BUT THEN THEY STAY DOWN.
But right now one plays with his good friends, gets carried up, then drops, plays with his friends again, GETS CARRIED UP AGAIN, and then DROPS AGAIN, RUINING EVEN MORE GAMES. We really need a fix for this...