Actually, I probably agree with the notion that Bloom could be in "over his head," but with some caveats as follows--
1. As others have pointed out, this is first time as the honcho. He was great at the Rays, but never fully in charge.
2. The Rays system of finding and developing players is vastly different from the Sox system. If nothing else, the Sox can afford to spend at least twice as much on salaries as the Rays. They rarely develop good pitchers and prefer to buy 'em by the gross. The Rays find and develop good pitchers every freaking year.
3. DD inherited a ton of talent drafted/developed by Cherington and Epstein--and left a train wreck. Where, for example are all the great prospects he drafted 6 years ago, 5 years ago, 4 years ago, and 3 years ago? I don't see any. But DD inherited Mookie, Bogey, Raffy, Beni, JBJ (when he was good), Holt, Leon, Vazquez, Porcello, ERod, Kelly, Barnes, et al. So all DD had to do was go out and buy Price, Sale, Kimbrel, and JDM--all of whom were paid handsomely--to get that 2018 WS team.
4. By train wreck I don't just mean no player development. I also mean the Sox are still paying major bucks--$63M for Price, Sale, and Eovaldi--this year even though they aren't doing jack for the Sox. I also mean that, partly because of those salaries, keeping three of the best--Mookie, Bogey, and Devers--became impossible in Mookie's case and problematical in the cases of Bogey and Devers.
5. At Tampa there wasn't a lot of pressure because their fanbase was and is virtually nonexistent. Sox fans ain't so patient. Actually, if talksox and this thread are any indication, Sox fans have zippo patience. It's like working for the Queen of Hearts, whose usual remark is, "off with the heads." And I'm pretty sure that chant started in Bloom's first season, 2020, which to me was a nonseason because of the pandemic. Did it abate during or after the very successful 2021 season? Not so's you'd notice. And this year so far it's now a 235 page thread.