Simon was crap, not sure where you plucked average from.
Kubot hit the ground with ss's to df twice down bp in the 3rd set, that tells you all you need to know about his mental strength.
Simon was pretty bad, but he did improve a little bit, the middle of the final two sets, he played pretty well.
Was that serve in the third set? I thought it was the second, I wasn't sure. Definitely was a hilariously bad serve.