You managed to pack a great amount of nonsense in one paragraph. I've bolded the most hilarious part.
First, you need to know what you are talking about. McEnroe was not defaulted at the AO for anything having to do with time violations. He was defaulted because, after he got a point penalty for repeated racket abuse, he started arguing and asked for the supervisor, who came to the court and simply told him to keep playing. As the supervisor was leaving the court, McEnroe could not resist addressing some obscenity at him. The supervisor turned around, went to the chair umpire, and told him to default the brat.
The astonishing thing is not that he was defaulted, but that it took until 1990, near the end of his career, for someone to do it. I don't know of any other player (not even Nastase or Connors) who got away with so much obnoxious behavior as McEnroe when he was on top of the game in the early to mid 80s. From smashing a whole line of glasses and bottles with his racket, to vicious abuse of chair umpires and everybody else - repeatedly. Time violations??? That was the least of it. Whenever he took it to his head to argue with an umpire (very often) he didn't take 35 seconds. He could take many minutes. Sometimes opponents would sit down near the baseline to rest, knowing the ranting would take a while to end. I remember one time Emilio Sanchez got tired of waiting and took advantage of a brief pause in Mac's ranting, to ask him a question: "Are you finished?" And Mac replied: I'll be finished when I kick your asss.
It is totally hilarious that you bring up McEnroe to argue that Nadal and the top players get away with murder these days, as opposed to the days of McEnroe, when they were so much stricter. LOL. If any player today did (and kept doing) a tenth of what McEnroe kept doing in his days, he would not only be defaulted frequently, he would most likely be suspended for several months or years.