There needs to be some kind of automatic threshold/filter for people intentionally tanking their rank

My friends and I have essentially been closed out of playing competitive on the OCE region tonight because of a single thrower. We're not the only ones - I've received warnings from others not to play because of this one guy.

OCE already has a pretty small player pool, so a single dedicated thrower can basically kill competitive for an entire bracket for however long he decides to throw. This dude has been throwing for hours - at least five or six. After getting him for three games, we took a couple hours' break to avoid him, came back, and he was still playing (and still on our team, yay). The entire server is talking about him, everyone recognises him in the games he's in, everyone's reporting him.

I'm wondering if there can't be some kind of system check for this behaviour? If someone's lost X games in a row, check unique report rates; once both reach a certain threshold, automatically suspend the player's ability to queue for competitive until the issue is investigated and resolved. It seems absurd that a single person can hold an entire server hostage for hours on end.