To be fair, sometimes it isn't the worst ADC in the match up.
One game I had a support Leblanc that just didn't know what to do besides go in. She would get to lane, dive in to do a combo, and basically forget she could reactivate W to come back. I think she died 3 times before I got level 4.
Another game I had the enemy Shaco jungle gank twice while he was level 2 and then the mid Leblanc and jungler came down when mid hit 6 even though her lane was in the middle of the lane and she didn't get a kill on us. We were actually winning trades up until that point but they just sieged the tower and there wasn't much we could do without dying to them.
Honestly, teams need to take advantage of this. Come gank bot when you can. Go get your jungle item or hit 6 if you're a solo laner and then come bot for the free tower and possibly some kills.