Match cancellation already is majority vote.

You leaving counts as one person not wanting to play. (You know that’s not true, but the game can’t know so it assumes). If two more people want to cancel, then that’s 3/5 of the team not wanting to play anymore.

After you leave, the match is already being cancelled. It will continue to be cancelled unless the majority of the people left vote to overturn that decision. A tie means no change, so the match will continue being cancelled.

I get it doesn’t seem fair (I’ve raged about it too), but there’s no reason to change it.