ADC has and always will be an unbalanced role
You have no agency as ADC. Top & mid have the biggest impact on the game.
Jungle is reliant on them because they're always behind on XP due to the changes. Everybody can burst and if mid-lane or top loses, it just turns the midlaners into 1v5 players who can burst and stay tanky at the same time.
It's pretty ridiculous how bad the state of the role is. If your support is bad, you lose. If your mid is bad, you lose. If your top is bad, you most likely will lose. If your jungle is bad, you most likely will lose.
All lanes need to be decent for you to do exceedingly well. All lanes need to be decent if you want a chance at winning.
If one lane feeds or has 7+ deaths, you instantly lose unless you snowball so hard from the enemy bot feeding.