Comebacks are easy peasy...
If you pull your head out of your ass and stop acting like a bunch of children.
My last bard game had my team just under 12,000 gold behind at the 21 minute mark and struggling to even get to a turret. We stuck together, performed our roles, and did this great thing called teamwork. we won. ended the game at 39 minutes with a touch over 6000 more gold than the enemy team.
Contrast this with my last brand game. the team acting like a bunch of fools, jung decided afk farm was the way to win, chased across the map, and we had maybe 1 team fight. 22 minutes in, down 11,000 gold. Nobody stuck together, everyone chased that 7 health teemo through the team fight, and teamwork was a foreign concept. Lost the game.