It's not that they're unlucky it's that they're drafting bad. I'd be a better drafter than Sacremento. At 10 I would've drafted Donovan Mitchell. I supported the idea of us trading up to get him. I was begging for us to draft Lillard on 2012.. I had just turned 16. Its not hard to draft well, some front offices just try to get too cute and overlook the same things over and over again.
Yeah Sacramento are an extreme case. I did a breakdown of their drafts recently.
2011: had no. 7 and allowed Charlotte to take Biyombo with it. Could have got Klay Thompson, Kawhi Leonard or Kemba Walker among others.
2012: took Thomas Robinson at 5 and passed on Lillard, Drummond and Barnes.
2013: took McLemore at 7 ahead of McCollum, Adams, Antetokounmpo and Caldwell-Pope (he is not great but much better than McLemore ever was).
2014: took Stauskas at 8 but players that came after weren’t really amazing either. Warren, Harris, Saric were best but still nothing obvious.
2015: took Cayley Stein at 6 ahead of Turner, Booker but then again a lot of players just below him have not really been better than WCS either.
2016: traded their pick and actually got a decent return in Papagiannis (released), Labissiere (he’s fine) and Bogdanovic (he’s very good).
2017: took Fox who is good and fun, needlessly traded no. 10 to get Jackson and Giles, could have taken Mitchell but so could everybody else.
They have been better in the recent drafts but still wasted so many picks before. You cannot always get them right, of course, but they NEVER got it even remotely close to right between 2011 and 2015. That’s a truly bad record and they have missed out on several potential franchise changing players during this time. It’s inexcusable. Even Phoenix got Booker to show for it, Sacramento have basically got nothing for years of tanking. Fox is the first player they might be able to build around.
That said, Orlando are just as bad. Wasted so many picks on average players and even the ones they seemed to have got right have not progressed much so far - Gordon, even Isaac (early days). Players like Payton and Hezonja they had to let go for nothing because they wouldn’t even keep them.