But are you actually sure of that?
No matter what direction i look at 50/50 winrate it means that the system will do its best to cripple you one way or another.
Lets put it into another perspective, you are a long range runner in the paralympics against wheelchair guys. You are perfectly healthy and have 100% winchance against them so to make the event balanced the jury either puts weight on you (people from low ranks) or put the wheelchair guys closer to the goalpost (much better enemy team).
Lets say that you are 2v2 in a new competitive match. You have 4K sr and your teammate has 0, your enemy is two 2K sr guys it doesnt sound fair that you are teamed up with someone who is literally worthless but in the eyes of the system its fair because you are on avarage 2K team sr so the 50/50 ratio was met.
If this wouldnt be the case a premade group where they have 1000 sr difference between their members would be immideatly matched with whatever team the system finds but thats not what happens. The system will take some really long time to find a match where the 50/50 is met even if that means that your avarage but well performing silver team will fight with high gold guys. If you win in that the system will just add it up that you need harder opponents to even out.