I never said our players suck. White has value. More than Porzingis who GS traded Kuminga for. I think it is reasonable to assume the difference in value between white and kp is podz and a 1st vs. Hield. No idea if GS would have done that, but it was reasonable value.
Kuminga, Hauser, and 3 1st's for JJJ is definitely on par with what Utah gave up. Matter of preference for Memphis at that point in what they preferred.
Again, the drive to get out of the tax made all of that impossible. It was never explored. No way to know what might have been out there if you aren't looking at it.
Moranis, I am not sure who you are debating on this. First, do you agree or not that trading Simons for Vucevic was a good trade? That can be graded or judged all by itself. It does not make anything else BOS did or didn't do good or bad. I like this trade. We would be worse off without him, this series and in general. I don't think this is part of the debate.
Then it is a question of what else they could have done, whether they passed on other deals due to finances or just plain didn't even look at other things. You seem to be convinced that they never explored other deals, that they didn't even look for other deals. I find this a little hard to believe. I don't know of course (any more than you can know), but I suspect they did plenty of exploring and looking at things.
You have offered a couple of examples (Kuminga or Jaren Jackson) as examples that demonstrate there were deals out there, while conceding (I think) that neither of these specific deals would make sense or be doable. I believe they probably checked in on both these possibilities. I don't see Kuminga or Jackson making the team better this season. Jackson had surgery and has been out the whole time. Maybe you go all in for him if the team was at 0.500 at the deadline and Tatum is not looking like he is coming back, with an eye towards next season.