They either pick the wrong guys, or they screw up the development. Either way, the organization needs a management change.
Are there actual examples of development they've screwed up, or are we just lobbing that one out there? Let's take a look at the 2 disgruntled employees. DeBrusk spent a year in teh AHL, then was called up. He had 2 good seasons to start his career. He started off year 3 well before the wheels fell off pre-pandemic and he's never recovered. What could the team do differently here? They've kept him in the NHL. By and large he's played with quality linemates. His primary centers have been David Krejci and Charlie Coyle. They kept running him out with one of those two over and over again. Eventually his lack of production became untenable and they looked for an alternative (Hall). You can quibble a bit with Bruce's harshness on DeBrusk and maybe a little usage early on this season, but I don't know how you can hold up DeBrusk as an organizational developmental failure. He's had every opportunity, at some point he just has to produce. He has to give them a reason to increase his ice time, put him on teh power play, etc. Jacke's done none of that.
Senyshyn spent two full seasons in the AHL. At the end of the second season, he got a thank you call up for the last two games in the regular season while the Bruins were resting players. He spent the playoff run with the club as a member of the Black Aces. He started the next year in Providence. He was called up in early November and given an opportunity to stick and promptly got hurt in his 4th game. He started last year in Providence, got called up on 3/11 and, again, got hurt in his first game. He returned from injury on 3/27 and played in 6 consecutive games registering 0 points and 6 shots on goal. Then the deadline came and they added Hall and Lazar, which sent him back to Providence and he hasn't been back since, with the exception of the final game of the year when they were resting everyone. Again, what should they do differently? He was given 3 opportunities to stick on the NHL roster and either got hurt or failed to make an impression. Maybe the injuries are bad luck, but what is the team supposed to do? Sit and wait and try again when he's healthy? They did that on the last injury and he failed to make an impression. Maybe he's a little chaffed that Steen has passed him on the depth chart and seems to be first up when they need a winger but Steen's been a better player. This is the most laughable trade request I've ever heard. He's been waived twice in his career (last January and this October) and both times he went unclaimed. 31 other teams have had the opportunity to pick him up twice for free and said no thanks. Now, "I get a fresh start, and the organization can get something for me" Haha. What are they going to get, Ferm's broken puck?
As for the "they pick the wrong players" part of your comment, I disagree. They fucked up 2015. We know it, they know. It was almost 7 years ago at this point. t is what it is. Since then they've picked in the late 20's every year and have traded a ton of high picks for NHL help. I submit the farm system problem is due to those factors, not that they can't pick players. In 2016 they drafted McAvoy, Frederic, Ryan Lindgren who have become NHL regulars. Maybe Steen becomes one too. In 2017, they got Vaakanainen, Studnicka and Swayman. Jury's out on the first two but over the two years that's a pretty good draft haul. It is too early to pass judgement on the 2018 and up drafts. There's also this perception that they suck at drafting so literally every pick they make people kill them. If they pick someone ranked around their draft slot by the draft guru's (let's say Beecher or Vaakanainen) then the reaction is "Typical Bruins, going with the underwhelming safe pick." If they take someone off the board of the draft guru's (Lohrei) it's "there goes the dumbass Bruins going way off the board." I tend to think they're better than others at selecting players, they just don't have high enough picks to find difference makers, and they don't have enough picks to go with a volume approach.
There are a lot of valid reasons to want to move on from Sweeney/Neely (still not sure how much I link both of them together), but for me, draft and development is far down the list.