My Diamond promo games are cursed it seems.

My friend added the 1st one and he admitted to it straight up, then watched his match history and go from Gold 3 to Diamond with like 38+rr per game (finishing 50-3 in a 13-1 round game against Immortals).

2nd one maybe rage hacked once we went around 5-0 up after spending the first rounds AFK in base (presumably setting the cheat up).