Leeching / inactivity in co-op

Just in case Blizzard starts caring about toxic players / positive game experience…
Today I had a leecher in co-op hard. It wasn’t possible for me to win by myself.
7/13/2019 5:30-5:40pm est.
The report tool did not allow me to select “behavior” as the Blizzard code of conduct violation.
Blizzard code of conduct:
Behavior that intentionally detracts from others’ enjoyment (such as griefing, throwing, feeding, etc.) is unacceptable. We expect our players to treat each other with respect and promote an enjoyable environment. Acceptable behavior is determined by player reports and Blizzard’s decision, and violating these guidelines will result in account and gameplay restrictions.

Well you can select something else and write the actual thing that bothered you in the field below