Skimming briefly, it looks like a lot of the missing score are some combo of 6-0 and then 0-6. Which makes sense. It's highly unlikely for a set to to be that unbalanced, and then be so unbalanced the other way.
Adding some math: assume player 1 has a probability of p of winning a game, and therefore, player 2 having a probability of 1-p . Then, the probability of player 1 winning a set 6-0 is p⁶ ; the probability of player 2 doing that is (1-p)⁶ . Let’s assume a fairly evenly matched game, where p=0.6 . Then, those probabilities are about 4.7% and 0.4%. Combined, that’s about 1 in 5,000, or 1:2500 to get either of 6:0;0:6 o…
And if the first set is 6-0, that indicates one side has exceptionally better skills.