People always bring up Kane as a comp but I don't understand why because there's a big difference...Kane delivered on the ice! The Bruins didn't trade him just because he had off-ice issues...they traded him because had off ice issues AND after 3 full years and two deep playoff runs, as a #2 pick, he still wasn't an impact player for them when it counted. Leaving that out is ignoring a huge piece of the puzzle and revising history.
Oh and let it also be said that the first guy the Bruins "gave up on" was literally just handed away by his next team after he killed several coaches and got the team nowhere. The second guy, Seguin, was benched at the end of this season for more off-ice crap. Let's not make this out like the Bruins are the only teams sick of this crap from players.
How can you say he didn't deliver on the ice? I get the other stuff, but....?
He had a bad playoffs in 2012/13 (I've argued elsewhere, unlucky), but whatever, he was 21.
In his rookie year-- and I don't think B's fans give him enough credit for this-- he helped win the Cup, essentially single handedly winning Game 2 in the Eastern Conference final with a 4 point performance against Tampa, to even the series. We won that series in 7 games. Without Seguin, we would have lost it in 6. He was 19 years old.
In his second season in the league, he led the team in goals and points at the age of 20.
In his third, strike shortened, season in 2012/13, he contended for the team lead in goals and points. Seguin was also a Corsi beast in 2012/13, rivaling Bergeron for the team best. Everyone was a better player when he was on the ice, much like Bergy. And to pre-empt the inevitable 'Bergy was inflating his numbers' claim, in reality, Seguin's Corsi numbers in 2012/13 without Bergeron on the ice were slightly better than Bergeron's without Seguin on the ice. Together their Corsi average was 65 or something ridiculous like that.
So, other than helping us win the Cup, leading the team in goals and points, contending for the team lead in goals and points, and being a Corsi leader on the team, improving everyone's possession numbers and forming perhaps the most formidable Corsi partnership in the league with Bergeron, all before his 23th birthday, yeah, he didn't at all deliver on the ice.
Honestly, if people apply the standard that they measured Seguin by, to the rest of the B's, we'd have to clear out much of the team for failing to deliver / underachieving, save maybe Bergeron.