I know it's the easy answer, but the Irving year. I hated watching that team.
While this team makes me crazy, and many times it's not enjoyable basketball, I think they can play better. They just need to move the ball and work harder on the defensive end.
They have shown they can play better, they need to learn to do it for 4 quarters. I can't remember watching a team blow more leads. They simply can't close out a game.