So apparently the situation is roughly as follows.
Icardi deems Spalletti responsible for killing the confidence of the team and losing out in the Champions League despite the good start.
The management sort of agreed and had Spalletti on a short lease.
Some other players just got tired of various things at the club, including Icardi and Wanda antics, so they just found more solid ground to whine about.
Then Marotta came and wanted to give time to everyone.
There was growing tension in the locker room between pro Spalletti and anti Spalletti players. This is also when we have the Nainggolan audio incident.
Then Marotta decided that the plan was set and that pretty much most of the team was on the transfer list, including Spalletti.
So players got even worst with each other, Nainggolan and Icardi almost beat each other up after a game only to semi-reconcile around days later before another game.
And here ia where Marotta magic intervenes, calls everyone for an evaluation as well as an examination of team chemistry dynamics. A shitstorm followed and it was apparently obvious that there were issues between Icardi and Spalletti, some other players with Spalletti - backing Icardi - and then other players who had a beef with Icardi. And lots of those backed Spalletti.
So Marotta in the meantime had called Spalletti up in a top meetin with Zhang involved to give him an ultimatum.
Then we have Wanda calling out "bad teammates" in public (probably a stab at Perisic mostly), Icardi uploading and deleting flaming posts right away and the Inter management saying Icardi is no longet the captain.
So Marotta and the Inter management who have told Spalletti that he's gonna leave at the end of the season if he doesn't bring us the Europa (as we were out of the Coppa already) and a 3rd place and have also told Perisic that there's no way he'll continue at Inter next season, have decided to penalize the AntiSpalletti camp leader and captain by pretty much telling him to fuck off. The one player who happens to be a certainty at the club as he had zero intentions of leaving. The player who now earns as much as Tottenham's Son (when he signs)...