Well that’s unfair. He’s had plenty of hits in the first, mid and late rounds over the years. Gronk, Flowers, Thuney, Mason, Flowers, Collins, etc. all have been great compared to draft slot. He might not be noticeably better than other GMs, and he has drafts that end up stinkers (just like every other GM), but he is not necessarily bad at drafting.
Take 2016. The second rounder was a failure, but he drafted two linemen who are currently starters, a linebacker who is projected as a starter and another LB who has been part of a rotation, and a QB who is a backup, but who started his fair share of game.