Dude needs PP's to be the "best player n the world."
You're totally wrong, of course, as back in 2017 and 2018 and 2019 and 2021, he was leading the NHL in ES points (by huge margins in 2018 and 2021).
You bring up an interesting point for me, however, which relates to McDavid's recent decline in ES point scoring.
Starting in 2021-22, he just hasn't been as productive at ES. That was the year the Flames' big-line had its huge year, and (in just 2 more games played) the late Johnny Gaudreau outscored McDavid at ES by 12 points. Then in 2022-23, despite having arguably his best-ever season, McDavid was easily outpaced (and outscored, just) at ES by MacKinnon but also by Pastrnak. Last year, McDavid was maybe the best ES point producer, but he was basically in a three-way tie with MacKinnon and Kucherov. So far this season, he's probably the 4th or 5th best ES point producer. (He has missed six games already this season.)
The Oilers' PP suddenly became awesome around 2021-22, so that partly explains why a bit more of McDavid's effort and point-production shifted to the PP, but otherwise I can't really explain why this minor shift started happening when he was around 24-25 years old, right at the scoring peak age.
In his prime, Gretzky was by far the greatest ES point producer ever, and even after a couple of semi-serious injuries and his 'trade' to L.A., he remained the greatest ES point producer in League history, up to 1991 when he was 30. That September, he was injured by Gary Suter at the Canada Cup and overnight, Gretzky's ES point production plummetted to human levels (to the point where, in 1991-92, he was suddenly matched in ES production by... Ray Ferraro). Somewhat the same applied to Mario Lemieux -- though never as productive as peak-Wayne at ES, Mario by 1995-96 was getting nearly half his points on the PP, so the shift kind of occurred.
It's very natural for ES point production to decline in this way as elite scorers get a bit older and slow down, etc., but in McDavid's case I can't really explain why his ES point semi-dominance kind of ended when he was around 24 or 25. The Oilers were only getting better and his teammates probably stronger. I guess as long as you're getting it done on the PP to compensate, it doesn't really matter (like when you score 153 points), but I notice the difference in recent seasons.
As to this year...
meh. Nobody in Oiler-land cares about McDavid's regular season stats anymore, least of all him. Until a few weeks ago, he was still leading the NHL in points-per-game vs. actuall goalies (discounting empty-net points, which MacKinnon and Kucherov are more adept at getting), so it's not like he's a bum or anything. His mid-winter passion probably went more into the 4-Nations thing than into another regular season game vs. Anaheim or whatever. That being said, he has been wildly inconsistent this season. He had a crappy start, along with the team, and then he was the best player / scorer in the League for about 30 games or something, and then a slow-down, and now he's crashed and burned over the past month to the point where, at ES points-per-minute, I think Jeff Skinner was outscoring him since January...
But none of this matters until the playoffs start.