I sympathize :) . I am not a bad putter. I have 68+% of first putt (which as to be correlated with a 10ft average distance to pin on approach shot, it's much easier to sink a 10 ft putt than a 20-30 ft putt or longer). But I am nowhere near the top in the leaderboard :) .
That CTTH is really a nice idea, it changes from usual CTTH. However, wind doesn't affect much the trajectory and putter have a great precision. This means that from one round to another, you have almost everything identical.
If you are patient, you can play it again and again and put marks on your screen where you move the aim and how much power you use for each hole (you can use a non permanent marker pen). Then you correct your marks from one round to another. This way you can get very close to the pin each time and sunk several of them. That's not what I am doing because I do not have a patience to play this CTTH again and again :) . But those who want to post a very low score, that's a possible method.
Still 8.11ft is a great score whatever the method used. I am most of the time behind the leader after my first putt :) .
Regards