Most (all?) of the schools you list declined to participate (or were ineligible) in the Economist's ranking system this year it seems. Note that the last time they did participate, many of them were top tier. Harvard (2 in 2019), Stanford (8 in 2019), Columbia (15 in 2019), Wharton (5 in 2019), NW (4 in 2019), Chicago (1 in 2019), etc. etc.
https://whichmba.economist.com/ranking/full-time-mba/2021/me...
Notably this list is missing most top-tier MBA schools like Harvard, Stanford, Columbia, Wharton, Northwestern, U of Chicago, MIT, UC and others.
If you want to say some of these schools are overrated, fine, but if none of them made the top 90 you've got a weird rankings methodology that isn't gonna be useful to most people.