Yeah I watched, its possible you did that, its suspicious though that you left the same moment you got killed.
Anyway I can also see you played 160 games this season and had only 2 autobans, so I will unban you based on that, you don't seem to be rage quitting from games.
Change your hotkey so you don't use 'q' or use something which blocks 'alt +q' from happening.
!unbanned