I'll bite mate, only because I suspect you might be the only person who hasn't heard me grumble about this whole thing LOL (trust me, regulars here will be sighing and going elsewhere LOL)...
The 2018/19 season was, IMO, Poch's greatest season. He defied the sorts of odds to get us top 4 and into the CL Final which no other manager, not Pep, not prime Fergie, would've achieved with the squad and injuries he had. No signings that summer (due to a belief that there were only so many Njies and Nkoudous one could tolerate). Injuries. Players who he knew would not be extending their contracts. The extended time at Wembley (an extra 2/3 of the season when it was said we'd be back home to start the season). The wobbles between him and the board (not the least of which was the whole Amazon thing - hearing about it that Xmas and being told, not consulted with). Yet through it all, he managed to get us back into the top 4 AND into a CL Final.
The mistake was Levy sweet-talking him into staying on the premise he'd be backed and all would be well. Hindsight certainly says we should've made the decision then -amicably. Instead, and this is my opinion solely so I'll accept criticism for it, Levy simply could not countenance the bad publicity he'd have got for letting go of a manager who'd 'just been at the CL Final' and who had spent a month tops as manager in the new stadium (one he consulted on with regards to dressing room and manager/coach facilities). He had to try and make it work. Which is a decision I'd have applauded had it been a) for the right reasons and b) been stuck to for the rest of season 2019/20.
Instead, he signed two players Poch really wanted, all seemed OK, but then we see Mourinho in the stands as a guest! You couldn't script it really. And eventually Levy cans him, knowing that he can announce Mourinho the day after because the Machiavellian that is Mou had been doing the dirty and negotiating with Daniel, knowing how badly Daniel had always wanted him!
I'll concede that Covid made it impossible to know whether ultimately Mourinho would've done OK, because with no income and Jose's overall lack of interest in working with the tools he had, it was doomed to failure.
I still think Poch had earned the right to rebuild again. But the truth is, he was fudged from the summer.