jus let the pointless game end
tasstard wall them so they cant get into base to heal

Pick Medivac and fly into their base.(note 4 reports for medivac)

VP your own Garden Terror so the timer expires.( 1 report)

Use helping hand and pull noobs into dangerzone.(yiou hit q instead of W ofc)

Pick healer and keep hitting alt+q on certain player then tell them they die to fast do be healed(1 report and the flamer gets 4 reports)

Pick Medivh and create portals into their dead(those using locked camera will hate you)

Or the easiest way to end games quickly by losing.
Pick a crap hero or a hero already countered.