Now, they are a 6-seed down 0-2 with a $150 million payroll on the books for next season, and everyone involved knows there are probably going to be changes up and down the line. Maybe the 76ers get a win or even pull out two victories against the Celtics — though that is unlikely if Jayson Tatum keeps playing like a passed-over MVP candidate — but it will almost certainly not change the reality. It’s plain to see on the 76ers’ faces and in their body language. Like many teams before them over the decades and probably many teams to come, they are going through the motions of the end of the dreaded letdown season.