Always 4v5
One day, maybe you can fix your "every other game is a 4v5 problem". Until then, if the team votes no, I plan on feeding to end it quicker. This is freakin' dumb. It's been almost a decade and you can't fix this issue.
At this point a CPU bot taking over is better than an afk. Try SOMETHING, ANYTHING.
Until then, deal with the way I play and going afk if the vote fails. You won't ban afks for some reason (if you actually did, they would stop happening so much), but if someone use a dirty word, god forbid, you get your panties in a wad and chat restrict them...
No wonder you're losing players and have to come up with new game modes to keep them...