Basically they have used 5 high draft picks over 3 years, with near no NBA on court player development over that time. They may be on track now, but going through 3 years of having a d-league team with the cornerstone players not even suiting up is tough to swallow.
I think as Celts fans we have to remember that Sixers fans watched the team be utterly and totally mediocre for over a decade.
After they made the Finals in 2001, they won 43, 48, 33, 43, 38, 35, 40, 41, 27, 41, 35 (equivalent to 43 -- lockout), and 34 games.
During that time, the Sixers made it out of the first round just twice -- 2003 and 2012. They never made it further than the second round.
That's a loooooooong time to spend in the purgatory of the NBA middle class.
During that time, their lottery picks were Iggy @ 9, Thaddeus @ 12, Turner @ 2, and MCW @ 11.
From that perspective, it's not surprising that many 76ers fans were willing to spend a few years at the absolute bottom of the league, if it meant they'd have a very good chance of finally getting the pieces necessary to climb out of the morass of the NBA middle.
Rest assured, if the Celts ever spend 12 years winning 30-45 games and rarely making it past the first round, these forums will be a writhing mass of fans screaming for the mercy of a comprehensive tank job.
Pho are you already forgetting about the period between 1992-2007?
Celts had Pierce and Walker during that time, won 49 games and made a Conference Finals, and had multiple shots at a top 5 pick.
Definitely a comparable stretch for the Celts, but not nearly as resolutely down the middle as it was for the Sixers.
The Celts had chances to build up out of the middle, they just did a very poor job of it until new ownership came in and Ainge / Doc were hired.
Also ... pretty sure the hunger for a tank job was there by 2007.