I disagree, seems like Boehly gave Tuchel every opportunity to be a big part of the rebuild but Tuchel was disgruntled and moody by all accounts.
He didn't want to be involved in the transfer side of things.
He was sulking about losing Petr Cech.
He didn't want to have an input on future sporting director.
But most importantly he lost the players/locker room. Around seven first team players left this transfer window and still 7-8 more either wanted to leave or were on the verge of leaving, and now further unsettled. With Rudiger gone and Azpi checked out they also have no leadership, you can't expect a 22-year old Reece James to do it all (he just go bullied off of a free kick yesterday).
And then on top of all of that add losing matches and Tuchel was cooked.