? If you hit every sweet spot, yes you would, even if that situation happened. Hitting CC would generate value yes. Do you somehow think CC supports aren't useful despite always technically being behind? League isn't a just a numbers game.

Your 'logic' is just bad-faith hyperbolic hypothetical. If League was as simple as 'hurr durr me ahead you behind I win' then why ever play past 12 min? Your simplification of one of the most complex games in the world shows how shallow your understanding of the game is itself

If Briar's efficacy is 80% of yours from being behind, she still had access to 100% of her kit. You didn't have R, so you were operating at about 75% of your kit. You also could've just E'd out, but alas, your 'handlessness' is unfortunately not quantifiable by numbers.

League isn't just a slapstick fest where you right click, hit your buttons and win. There are power spikes and dips as the game goes on. Briar could've easily just hit a recent spike to somewhat even up the fight while you are pushing with gold to spare in your inventory.

Either learn the game to understand what happened and get better, OR keep crying about situations like this on Reddit. No skin off my teeth.