Losing ladder rank in 4v4 from wins?

Can someone explain to me how this is possible?
Match 1, win
Everyone on my team was around my rank Ost (682) so 700-1000 rank players
The opponent team was all higher ladder rank, between 200 and 400.
With this win I LOST 30 places in the ladder to 712.
I then played another match, won that one.
The opponent team was farther down the ladder rank, in the 1500-2500 rank area.
With this win I LOST another 2 places to 734.
The third match was also a win.
The opponent team was a mish mash of people that only play arranged teams, they had no ranks.
With this win I lost another 2 places to 736.

This makes no sense to me, other than people climbing a head of me, this could explain the 2 last ones, but the largest loss in ladder rank was the first match, which was against much higher ladder rank players.

The only reason I really care about this is when you ladder rank this low, you lose about 70% of matches due to people rage quitting on your team in the first couple of minutes. Once around 400-ish on the ladder the teams are mostly not retarded.

Can someone explain to me how this is possible?
Match 1, win
Everyone was around my rank Ost (682) so 700-1000 rank players
The opponent team was all higher ladder rank, between 200 and 400.
With this win I LOST 30 places in the ladder to 712.
I then played another match, won that won.
The opponent team was farther down the ladder rank, in the 1500-2500 rank area.
With this win I LOST another 2 places to 734.
The third match was also a win.
The opponent team was a mish mash of people that only play arranged teams, they had no ranks.
With this win I lost another 2 places to 736.

This makes no sense to me, other than people climbing a head of me, this could explain the 2 last ones, but the largest loss in ladder rank was the first match, which was against much higher ladder rank players.

The only reason I really care about this is when you ladder rank this low, you lose about 70% of matches due to people rage quitting on your team in the first couple of minutes. Once around 400-ish on the ladder the teams are mostly not retarded.

the elo is superbroken, but never lost ranks when winning

the elo is superbroken, but never lost ranks when winning

If you watch twitch streams, there have been many times were the streamer loses a match and they get the "promotion" notification at the end (wouldn't this donate rise in ladder?).

If you watch twitch streams, there have been many times were the streamer loses a match and they get the "promotion" notification at the end (wouldn't this donate rise in ladder?).

It happens only when you are playing arranged team, and it was always like that. Whenever you finish a premade team match, it displays your current team rank at the end, no matter if it was a loss or win. The "promotion" in this case can be safely ignored (bug)