Adc feels worthless when your team is behind
When playing from behind people start mentally giving up before the adc can get anywhere near their 3-4 item power spikes.
Supports dominate lane play, so getting fed is hit or miss depending on if your support is going to afk at the tower or not. Working on cs alone doesn't get you fed enough to counter a fed solo laner and its impossible to keep up if the enemy support is significantly better than your own.
I spend the whole game diligently working on items and not dying, then as i'm finally getting somewhere, my team is mentally already done making mistakes left and right and afking
or lose maybe going utility adc might help idk