Too little is a problem.
Too much is a problem.
You want something in between.
Room to grow but enough support there to help them where (ball-handling, passing) and when they need it.
Yeah, I just think it's way too soon to jump to the conclusions you're making.
Also, we have seen that NBA players these days, especially ones who fancy themselves stars, are super mercurial and it's impossible to predict what will make them happy or unhappy.
It's up to Brad to try to get the chemistry right this season.
There are a lot of offensive minded players on the roster right now, but many of them are slated for a smaller role. I don't think Carsen Edwards is going to be the reason Tatum doesn't get enough touches. Enes Kanter only plays half the game at most and isn't a guy who has the ball in his hands much. He's a garbage man on offense.
If Kemba dribbles the air out of the ball and Hayward dominates all of the secondary playmaking responsibilities, I could see that maybe becoming an issue.
As long as Brad calls plenty of plays for Tatum and treats him like the #1 or #2 (maybe 1b) offensive option next to Kemba, Tatum shouldn't have any real reasons to be upset.
Of course, as I said before, just because there aren't any good reasons for the player to be upset doesn't mean he won't. It's really not possible to say now other than the fact that winning games tends to keep players satisfied at least in the short term, while losing (or winning less than anticipated) brings out all of the misgivings that might otherwise be kept quiet.