Giving up 93 points can't be considered poor defense. (as bad as it looked at times)
Scoring only 90 points certainly can be considered poor offense.
You can't blame Hayward either, he's hitting shots, playing good D, and making steals. The problem is he's on restricted minutes. Kyrie slowly but surely is morphing back to himself after also rehabbing during the summer. In that second half, he looked better. Same can be said of Theis.
The player that worries me is Jaylen Brown. He really looks like he's going through the motions. He's so mechanical out there. He missed some very easy shots.
Tatum was taken out of the game early because he was losing his man and generally playing poor defense. Allowing the Magic to get off to a fast start.
This team needs a trade, the rotations are too long, nobody is finding his rhythm out there. The ball needs to get into the paint much more on offense.
IMO Unfortunately, the players we need to trade don't make enough money to bring anyone of value back, dollar for dollar.