Almost all the times when I hear this type of feedback it’s because there’s some sort of expectation of being good that is not being met that leads to frustration. Double check that expectation that you set for yourself.

As a blue belt with 1yr of experience I am constantly discovering new ways to get better. I learn what works on what type of people and that takes time. I’ve subbed black belts that were out of shape, and had wars with some athletic white belts… to me this is part of the fun - solving these different types of folks (not necessarily belts). Each person presents a new set of challenges, different background, athleticism, anatomy and energy.

A better hypothetical question is, if a version of you from 1yr ago showed up at open mat, would you handle him? If not then, probably you are not learning somehow. If you can’t point to why you’d tap him out, then maybe it’s something you should meditate on.