I dont actually see that.
First I would say its nigh impossible to grade the last 3 drafts not really enough data yet...even Jordan Jackson was on a roster in 2024.
But we can grade his drafts from 2006 to 2021. I havent done all the math but when recently perusing the quality of the draft classes over recent years I noticed something. I was in profootball reference and you can pull up a Draft and sort it by Weighted Career Avg. This isnt the best metric but it does give you an idea of how a career has shaped up so far. Its a continuously aggregating number so active players will only get bigger numbers as time goes on.
I think its a reasonable way of looking at a draft class as they arent all the same. I first noticed the phenomena when looking at the 1970 Draft Class which has only 2 HoFers. The Saints selected a WR that was soon traded to Houston with the 10th pick. But the class was fairly shallow and the WR is actually 9th in the draft class when sorting by the above described metric.
But here is the funny thing I noticed. In almost every draft class from Loomis he has some player selected that sorts above or about where his first pick was. In many drafts his best pick sorts way above where he made his first selection at. In some drafts such as 2017 he absolutely crushes the draft. Just having perused the data I would speculate that on the whole his drafted average for his best 3 picks from each draft class is WAY WAY above his selection position for those same 3 picks.
Yeah he has some bad draft classes but i think its silly to say he has been bad at drafting (well at least in comparison to reasonable expectations).
If you want we go draft class to draft class and see if my hasty observation is accurate? What draft class do you want to start with?