While I agree, you are too harsh. Every GM makes mistakes. You have to compare against other situations.
Having said that, BB was a terrible GM for the last 5 to 7 years. Having said that, does the scouting department have any culpability? The 2024 draft was so bad, I hope we can agree that Wolf and Groh should be gone post haste. One of BB's biggest mistakes was not firing Wolf and Groh.
You have to judge Belichick 2020-2023.
Judging him on 2015-2019 (bad drafts, etc.) requires that you understand there were so many factors involved in keeping the team primed for Super Bowls, and this meant trading the future for now, letting players go who you could develop for the future, trading draft picks for veterans, sitting young players, 3 prime draft picks lost to Deflategate, swinging for the fences on a DT like Easley when he was injured, drafting at the end of every round, letting players like Froholdt and Fleming go because you don't have the roster space since you maniacally insist on keeping 8 special teamers, etc.
We traded a 1st for Brandin Cooks, a 2nd for Mo Sanu, we traded a lot of mid round and late round draft picks for veterans, sort of like the Chiefs are doing right now by bringing in a slew of vets. This is basically trading the future.
A couple of the post 2020 drafts have been really good, a couple of them bad. But the FAs he brought in from Hunter Henry to Matthew Judon and several others have been good.
The big problem was the Mac Jones pick.
But Im not even mad about that anymore since we wouldn't have drafted Drake Maye.
If Kraft figures out how to be an owner soon, we will look back and think this franchise lucked out by sucking in 22 and 23.