1. Not signing at least one competent big man this off-season. Dumpster diving doesn't work for a contender.
2. Not adding to the coaching staff after losing Ime and Hardy. That's a ton of talent that simply wasn't replaced.
Those two decisions alone show complete negligence, bordering on incompetence. There are other decisions that Brad just chose wrong on (like Gallinari over Bruce Brown), but the above two are decisions that no competent GM should ever make. (Not using the TPE is the other decision that's borderline indefensible, if Brad truly does have an unlimited budget.)
Although I think Stevens is a very solid GM, for me he’s still living off the accomplishments of Danny Ainge.
Danny selected Smart, Brown, Tatum, Williams III, Williams, Prichard and brought in Horford as a free agent. That’s the entire core of the team.
IMO Stevens biggest accomplishment was simply bringing back Horford.
Brogdon chose the Celtics, Stevens did not enter the equation. Indiana told him they wanted to rebuild and gave him the teams that were interested in a trade and had the necessary assets…Brogdon then chose the Celtics.
Stevens selected Begarin over Brandon Boston Jr, something I still can’t fathom.
Boston Jr reminds me of a skinnier Jaylen Brown and Brandon is actually from Georgia, so I’m sure he looks up to Brown. Boston Jr was also very close with Terrence Clarke, who’s dream was to play for the Celtics, so there would never be a lack of motivation for Brandon.
Zach Collins was available as an extremely cheap free agent last season and Stevens showed no interest.
Derrick White trade was a massive over pay to correct issues in the team that Stevens himself created by signing Schroder and Richardson, both known heavy iso guys.
Signing Gallinari over Ingles felt wrong at the time, as although Ingles is injured, he has had no prior injury history, where as Gallinari’s career has been blighted with various major injuries. Ingles was well known for his leadership qualities and he is a much better defender than Gallinari.