Vlade made the trade you are referring to on July 1 2015. But Vlade's quote in question:
was made following the Cousins trade on Feb. 25, 2017. So the pick swap trade has nothing to do with it.
On Feb. 15, 2017, the last game before the Cousins trade, the Kings started DeMarcus Cousins, who had failed to get the Kings to the playoffs for six and a half years. Cousins was surrounded by notable world-beaters Darren Collison, Ben McLemore, Arron Afflalo, and Kosta Koufos in the starting lineup, and Matt Barnes, Anthony Tolliver, Malachi Richardson, and Cauley-Stein off the bench (with a dose of Skal and PapaG to boot - Ty Lawson didn't play). The Kings lost that game on 2/15/17 to go to 24-33 heading into the All-Star Break, and had no hope of the playoffs. No player on that team surrounding Cousins (arguably not even Cousins himself) had anything resembling a star future in the NBA. The team was dreadful, it was going nowhere, and Cousins was not only an anchor on the franchise but unbeknownst to us a ticking time bomb as well.
On the morning of February 25, 2019, two years after Vlade's challenge to hear from those who hated the Cousins trade at the two-year mark, the Kings had a young and upcoming roster including Fox, Bagley, Hield, Bogdanovic, Barnes, Bjelica, a Harry Giles whose knee was apparently healthy, and, despite the disdain of seemingly every fan a starting center in Cauley-Stein who led the team in Win Shares. They were 31-28, in playoff contention and over .500 after the All-Star Break for the first time in 13 years - and they hadn't even been CLOSE to .500 after the break in 11 years.
If you honestly believe that the 24-33 Cousins/Collison/McLemore/Afflalo/Koufos/MBarnes/Tolliver/Richardson/Cauley-Stein Kings were in a better position than the 31-28 Fox/Hield/HBarnes/Bagley/Cauley-Stein/Bogdanovic/Bjelica/Giles Kings, you're deluded.
So my point stands. There is zero doubt that the Kings were in a better position on Feb. 25 2019 than they were prior to the Cousins trade. Anybody calling out Vlade for not resigning is being disingenuous. Vlade didn't step down because he fulfilled his own conditions, and put the team in a better position in two years. And five bad games to start the next season doesn't change that.
But hey, congratulations on allowing your anger to remain at the boiling point for four years. I'm sure it's great for your blood pressure.