Straight from the game’s description of the Gameplay Sabotage report option
Gameplay Sabotage is:
Actively harassing or disrupting your own team through the use of game mechanics or player actions. This includes placing a Symmetra Teleporter exit at a cliff edge, or intentionally allowing yourself to be eliminated by the enemy team (i.e. feeding).Gameplay Sabotage is not:
Simply making a mistake, playing poorly, or an unwillingness to switch heroes.
And also, straight from the patch notes.
The report option is to combat negative behavior, not to punish players for being bad.
Playing poorly/making a mistake should never be a strike against your account that could end in Blizzard suspending your game license.
If you dislike a particular person because they’re a one-trick, or they keep poking at tanks instead of prioritizing targets, you have a new option of Avoiding them as Teammate. This doesn’t put a strike against their account.