Yeah but people also like to omit that 12 and 19 were also busts. 12, 13, 15, 19 were busts. 14, 16, 17, 18 were not busts. The Senyshyn pick was awful. But the Bruins have had their fair share of surprises, too, with Pasta, McAvoy, Swayman and it appears Poitras.
Boston has been more good than bad for drafting. 2015 first rounder is the only real outlier (outside of Vaak) even then their other rounds in 2015 weren't bad at all. Jake Debrusk shouldn't even be considered a bust, most teams would be happy to get a pleyer like him in most years.
2014:
David Pastrnak - He was the pick of the draft! To get an elite 1st liner who's had 100 point seasons and a rocket is extremely rare this late in the first.
Ryan Donato - Although he's not a star, he's a decent role player. Only 3 guys in the back half of the second played 300 games and he's one of them.
Danton Heinen - Has already played 431 games, a reliable middle six guy who has even had a 47 point season. That's a win in the 4th.
Anders Bjork - Although not a very good nhler, he's still a guy who's played over 200 nhl games. As a 5th round pick, you can't complain about that.
2015:
Outside of the disastrous 1st, you still got
Brandon Carlo in the 2nd,
Jeremy Lauzon in the late 2nd and
Dan Vladar in the 3rd. That's 3 nhlers past the 1st round.
2016:
Charlie Mcavoy at 14 is a huge win. Arguably the third best player of the draft.
Ryan Lindgren in the 2nd is a great pick, he's a good middle six dman.
Oskar Steen has already 39 games under his belt, that's good enough for 5th out of 30 6th round picks. Can't complain about that.
2017:
Ignore Vaak, but
Swayman is a start and you got him in the 4th, even
Stud has the most games out of the players in his range (51-62)