I'm not convinced the team goes into clock bleeding mode. When the opponent steps up the defensive pressure, the "stars" fold, bad passes, turnovers and giving up fast break easy buckets do them in. I guess the reason doesn't really matter. Its wash, rinse and repeat almost every night, even when the "big guns" are healthy. Zion has shown flashes but injured way too much, obviously. But the consistency of the symptoms, no matter the lineup leads to the conclusion that a coaching change is needed.