The other patch, they admitted that they will avoiding add someone on a losing streak, to a match team that has a lower chance of winning.
MATCHMAKING UPDATES
When a player is currently on a loss streak, the matchmaker will try to avoid putting the player on a team that is statistically calculated to have a lower chance of winning.
Developer comments: Loss streaks never feel good. Before each match, we make a prediction about which team will win the game, based on the information we have about the players on both teams. This is how modifiers such as Consolation, Reversal, Uphill Battle, and Expected give or take additional Rank Progress after each Competitive Play match. Since most matches will have a team that has a slightly higher chance of winning, placing a player on the team with the higher chance who is currently on a losing streak is aimed at helping them have a fair chance of breaking that streak. While this won’t guarantee they’ll win, it does provide a helping advantage.
which basically mean they think someone on a loss streak, will suddenly not be tilted and not a total burden, that doesn’t always have like 50% of the stats of the 9 other people, cause 1-2% chance of winning lol