A healing monk named Toryko is deliberately losing in the arenas of SoloQ and refuses to discreetly heal his teammates, causing them to lose. Currently, he has suffered 10 consecutive losses and previously reached a rating of 2200 in SoloQ. His behavior doesn't make sense. I suggest looking at his account because it's affecting me too. I lost 100 grade points because of his behavior.
Character Link "Toryko": https://cp.pandawow.me/en/armory/pvp.html?guid=22959&realm=10&type=5&
I suspect that once his friend "Iñtéllígéñçé" reached the goal of 2200 rating in SoloQ, Toryko stopped losing consecutive arenas.
Maybe Wintrader.