Does anyone else feel pressured when support starts farming near you?

I can have perfect CS at the first 10 minutes as an ADC but suddenly the support (mostly ranged, but I've had a few coin melee supports do this) without relic stacks starts attacking minions that are low to CS for me, which is understandable as random strangers matched up together can't always trust each other to be good at the game.

But when this happens I suddenly stop looking at the mini map, stop trading, and forget to ward as I try to get the tiny sweet spot between being low enough health to last hit the minion, while being high enough health for the support to maintain their faith in my CSing abilities, and I tend to hit while their health is too high when this happens rather than too low out of habit, making us both miss the minion. This goes on until I back and get a lot of AD.

Does anyone have any tips on how to stop this from happening, or how to deal with it? I'm really having trouble CSing as an ADC sometimes because of it, at least when I compare it to my experience as Soraka solo lane and pre rework Anivia.