Backdooring is the most uninspired, uninteractive cheese in this entire game: a Trynd complaint
Seriously. This is pure exploitation of Riot's failed design paradigm and the surest sign that the weakness of structures this preseason is a disgusting joke. All it comes down to is which team has the most teleports up at a time and which cheesy piece of shit champ was picked to do it.
What was in mind when Trynd was designed? A howling, unstoppable barbarian that through fury alone could will himself through the battlefield to kill the enemy carry. So why then, for season after season, is he allowed to stand under turret for five seconds getting free hits, spinning away at first sign of trouble, or simply killing whoever his sent after him? Send two? Now his team will win the resulting 3v4. It doesn't matter if Trynd was a feeding piece of shit all game long. Doesn't matter if you kill him while he's pushing your turrets. He'll be back, and the second you step out of lane, your tower and inhib are gone.
This is not okay.
you don't want to fight them all at once, so you split push and take down the members of the combo individually. If they have a strong split push composition,
they won't fight you as a group, so you group up and siege down towers, forcing them to respond. If they have a good poke/siege team,
your best bet is to hard engage on them and kill them before taking an objective and counterpushing.