Players intentionally deranking teammates, changing their playstyle quietly targeting anyone that happens to be queuing up at the same time through tactics that cannot be classified under one or two of the categories given under the report feature. People who genuinely try during matches with 4-5 Star ratings getting teamed up with single star rated players who want to sabotage the entire experience for both teammates and the other team. The people who are actually trying to be good teammates and win the match to rank up are being undermined by players who want to passive aggressively tilt others forcing an incremental downslide towards maladaptive coping mechanisms. There’s no way out for the people who are authentic and genuine except to leave the game behind. Blizzard has no way to improve the quality of OW2 unless they go back to enforcing bans and holding real people accountable for their behaviors in-game by removing their ability to play the game at all.
TLDR: Activision-Blizzard is disassociated from real people who enjoy a cooperative gaming experience and should scrap the entire reporting system for one that uses active moderators that understand Incrementalism at its root source of Psychological Maladaptive Behavior or the game will be lost.