Honestly, as much as I like stats and SPSS, I have no idea what that Sean Hannity inspired chart is trying to show me. The "rank" on the right seems completely random. There are 2 stats, however, that jump at me: number of top 100 picks ranks 4th and yet total number of NHL games played is solidly middle of the pack. Thus, the "picking late" (and if he were picking late, how does that square with Therrien, especially, being the "worst coach ever in the NHL" as one poster said just yesterday) doesn't square, nor does the "6th or 7th round picks fail" argument square either.
Last, the pts & pts/game are interesting, but what's the weighting? I ask b/c the Sedins are 2nd in NHL scoring by a pair of brothers. The Gretzkys lead by over 800 and Brent Gretzky had 4 of those. The Sutters lead Wayne Gretzky by 79 for most points by a set of brothers.
The rank is simply where that number ranks league wide. So for example being ranked 4th in number of top 100 picks means only 3 teams had more top-100 picks. Though why 100 is used seems random, I mean why include the first 10 picks of the 4th round but exclude the rest of the 4th round.
But your right that there isn't a lot of relevant information that can be gleamed from this. For example we are 11th in number of top-10 picks which sounds like we are above average, yet we are tied with 8 other teams so we are in fact pretty much right smack down in the middle of the league.
And as you already pointed out, averages can often produce weird results. When looking at points per game, a team that picks lots of goalies or defence will come out looking worse even if the players picked are great players. It also favours for example taking high risks since you are better off having a player not even make the NHL then having a 4th liner that plays a few hundred games.
That said to the OP, I appreciate the work and truthfully there is no easy way to come up with stats that show how good/bad the scouts are.
My preference is to look at the number of top-6 forwards, top-4 defence, starting goalies a guy finds, and compare it to the average you should get given the picks. I only care about those picks since those are the guys that are hard to acquire, getting 4th liners is mostly irrelevant since you can pick ok ones up easily every year as UFAs.
For example, the odds of getting one of those players with a top-5 pick is surprisingly only 72.5%. So we are doing better then average in that regard. Do that for every pick/grouping of picks and you get a clearer picture of how much better/worse then average the team is at drafting/developing.
Here's where I get the odds per pick.
https://www.tsn.ca/statistically-speaking-nhl-draft-pick-value-1.786131