hyperbole
Blazers spent 5 straight years in the lottery in 2003-2008 and in the 5th year they ranked 7th in the NBA in attendance. From 2003-2013, the Blazers spent 8 of 11 years in the lottery, only won 5 playoff games in 11 years, and in the 11th season of that stretch, Portland ranked 3rd in attendance
the keys to those attendance numbers was that the Blazers had youngish players that offered a lot of hope and upside. First it was Roy, Aldridge, Oden; then it was Dame, Batum, Matthews.
if the Blazers had just rebooted the roster, year after year, and tried to win with a bunch of average to mediocre veterans like Derek Anderson (Simons), Darius Miles (Grant), Theo Ratliff (Ayton), Dale Davis (Timelord) and Reuben Patterson (Thybulle)....then yeah, fans would have stayed away in droves. That was the actually the team when Portland's attendance numbers cratered all the way down to 20th. When the absolute best a team can hope for is a 1st round exit, and a realistic goal is the play-in or back end of lottery, fans will start not giving a shit in a hurry
it is not a stretch of 22-30 win seasons that kill attendance; it's the purgatory of perpetual 35-41 win seasons