I think the writing is on the wall with these leaks this evening.
It also suggests the squad is somewhat divided over the Sancho situation which may have contributed.
I don't believe Sancho is the biggest cause for fraction of the squad. Sure Sancho has his mates. However, the Matic, Ronaldo which likely connect to the Bruno, Varane, Casimero, DDG... wouldn't back Sancho either on top of ETH's own signings, his players.
The turning point likely associated how DDG episode ended. DDG definitely needed to be replaced. However, giving DDG contract and agreed on it only to retract at last minute is poor form. Prioritizing Onana signing (the fee), while neglecting other area in the squad, only to not utilize Onana true ability with him making grave error and wasting the team effort last season to get into CL, does more serious damage to team morale than anything. Taking armband off Maguire, trying to sell him, only now to butcher Varane and start Maguire is another big blow. Sold Fred who despite his disastrous class performance in between, also had great performance. Replacing Fred with meek nothing special Mount, Amrabat or the goal threat exclusive purpose McTominay is another blow to the team morale. Suddenly there is burden on top of a friction heavy team. The guys who did help ETH last season reaching season objectives, now got the rug pulled under their feet of course wouldn't be happy.