Mate, being an emotional person does not necessarily mean fragile, so no worries

I think it is probably (specifically in his case)about understanding his idiosynchrasies and being prepared/a step ahead for any of them. Whether that's on us or not is likely another topic of discussion, the fact remains as our asset, we should have a bespoke plan to deal with him (and all of them in fairness).
BTW, all people need to take responsibility for their actions. He's made a couple of Richy-esque social media posts. Big whoop IMO.
It doesn't make sense does it? Why did we not make the deal to Everton work, knowing the player was happy to go there. I will make the assumption that for it to have got that far, there is no way Everton did not offer wages he was OK with? So why? As for the lesser fee to Vasco, well, let's face it, something went wrong over the Everton thing and it was obviously an attempt to financially retrieve the situation.
Nobody knows and your assumption is no more accurate or inaccurate than mine or any others.
I am not sure any comparisons can be made. Having said that, both Johnson and our DoF told him he was unwanted. I get the impression there was not the same level of clarity with Richy at all. Perhaps the club should've been stronger in the summer and been as decisive, but as you'll see below, I think RDZ would've liked to have had Richy around until we got a replacement in the squad (and I believe the club thought either Gakpo or Ndiaye were nailed on - they got it wrong, which happens...)
Indeed. A worthy question. We don't know. What we do know is that rather than wring the last drops of value from a registered asset we are paying approximately 100k a week to, we -as a club- made a decision to not include him in our Prem squad. That being the case, it was surely in our interests to do everything possible to get him off our books and out of the club (even if it meant a cheaper sale to Vasco). We decided that it was better to mothball him than let that happen.
I personally believe the club have made a stand against anyone who speaks out of turn (i.e. Romero last year) and as such, I don't think this is all De Zerbi's decision. So I believe it is absolutely performative in the sense of showing everyone else how to conduct themselves in this new era.
I agree with all of that in theory. And in practice - if we were. Where it falls apart with Richarlison is that he is still training with the squad. So it doesn't match up to me.
Goals will have to come from multiple sources. We are creating chances and thus far they have not. Like you (and many I trust) I have great belief that RDZ is getting us to a higher ground and greater standard and style of play. Whether that includes Richy is not my concern as I trust what he wants to do long-term. Short-term? Between now and January? I fail to see the difference in having him registered for the PL squad and available versus not registered for the PL and still training with us. IF it is a club decision (including but not limited to De Zerbi) to not have him in the PL squad for reasons mentioned, great, send the message, but not half-ar sed.
Maybe that training situation has changed. It needs to have, otherwise it makes no sense to me.
I think the club have tried to leave him hanging as the only issue here, when it takes two to tango. Say what you like, but it is part of the DoF's job to see situations like this coming and manage them. They did well with others this summer, not so well here.
Two dancers fudging up the ball here, and IMO, the main lead foot in this situation are the club.
We'll all survive I'm sure