@Redfrog
At PSG, Tuchel wanted Thiago Silva to have his contract renewed and insisted all over the season. Leonardo didn't make the necessary. Then Leonardo started to negotiate with the Brazilian defender after the champions League but it was too late. Also PSG wanted the players to reduce their salaries during the pandemic and according to some rumours Thiago Silva blocked this, which may have made Leonard bitter but that's just speculation in the news.
Tuchel then wanted a defender to replace Thiago Silva and was interested in rudiger. Thiago Silva hasn't been replaced and a central midfielder Danilo came. To make fun of Leonardo he decided to deploy Danilo as a central defender and also because he prefers marquinhos as a midfielder.
PSG lost several players like rabiot, meunier because end of contract... And failed to sign psg academy players their 1st professional contract like kouassi now at Bayern and he complained about it in the pressz criticizing the club, in other words Leonardo.
The assistant of tuchel made also odd interviews.
Tuchel was about to bench icardi during the whole season and did prefer for good reasons Kean. The issue is that Leonardo paid 50 millions for icardi and Kean is likely to return to Everton next season because there is no buy clause in his loan contract.
Also, in some way, tuchel started to irritate mbappe by replacing him during some games. The issue is the club needs mbappe to be happy in order to have a chance to renew his contract.
The case of Danilo is very emblematic of the tensions between the coach and Leonardo.
Just before being sacked I think he said in an interview that there were too much politics at psg which is a very political club.