German based fans comments :
there is little reason to doubt Tuchel's coaching skills. He faced a difficult season after losing Hummels, Mkhitaryan and Gündogan things piled on with Reus and Götze basically missing half a season each and he came out of it with a direct CL qualification, a group win over Real and the QF in the CL and a domestic cup. If it wasn't for his personality Dortmund would've probably been more than happy to extend his contract.
An article in German magazine Spiegel documents a fall-out over the recruitment of Spanish talent Oliver Torres. Mislintat negotiated the deal, Tuchel then changed his mind and Torres never signed. Though played down externally, it seems internally that both Borussia chief executive Hans-Joachim Watzke and sporting director Michael Zorc effectively sided with their chief scout. Since then, Tuchel and Mislintat seem to have had a strained working relationship.
Then three cornerstone players – Mats Hummels, Ilkay Gundogan and Henrikh Mkhitaryan – all departed. Watzke had previously made it clear that all three would not leave together. Tuchel’s frustration over this reversal has been well documented – he called the decision risky, a word sure to displease any chief executive.
It´s really tough to tell what is true and what is not, cause the last 1-2 weeks was an extraordinary public character assassination instrumented by Watzke, seemingly as a justification for firing a successful coach. Somebody needs to make the tough unpopular decisions against powerful people from the old era, inside the team and management, who work against it.
Tuchel got rid of Subotic (who failed at Cologne), Großkreutz, (who is now in Darmstadt in the 2nd BL) and Kuba (who failed at Wolfsburg). He didn´t want to keep Sahin, because he is always injured and super-slow nowadays. Schmelzer would probably have been replaced by Guereiro based on performance and Reus might have had a tough time to, cause he can´t stay healthy. The players with a good relationship to Tuchel seem to be Burki, Bartra, Dembele, Pulisic, Aubameyang, Ginter, who also spoke out for him after the Cup final.
Obviously I can´t speak about how Tuchel treats the cleaning lady, the scouts or office staff.
At the end of the day the main reason was certainly that him and Watzke did not connect on a personal or professional level. Tuchel wanted to push forward from last season and Watzke sold Hummels, Mkhitaryan and Gundogan, after I believe publically saying only two will be sold. And Mkhitaryan was one of Tuchels favourites.
To me at least in the public perception and representation Tuchel behaved clean and professional, can keep his head high and every player that has publically commented on the bomb situation did not want to play the next day and shared the sentiment of Tuchel. The behaviour of certain players after the Cup final was a disgrace. The coach picks the team and if he thinks Sahin is not good enough for the first 18, then it is his decision. A decision most experts and fans probably share. He can´t play him, just because his family is in the crowd.
Tuchel allowed Reus to stand around for 25 minutes in the first half with a partial torn ACL, cause he knew how much the first title meant to Reus and wanted to see whether it could be fixed at halftime. He didn´t have to do that either. So to say he´s just this cold-hearted anti-social bastard can´t be totally true either. Furthermore who they think they are buying with Favre. He´s just like Tuchel. A brain with little care for the personal feelings of players. He´s the coach. It´s his job to pick the team, and the players job is to play or to sit. He won´t cuddle them either.
We only had trouble with Tuchel once he wanted to leave. He entered negotiations with Schalke during the winter break when he had 1,5 years left on his contract even though the club had forbidden it. After that relationships between him and Heidel/Strutz deteriorated and neither side would budge, so Tuchel was put on leave for the last year of his contract.
The players mostly seemed to like him. The few exceptions (like e.g. Heinz Müller) were those he discarded, as Tuchel isn't big on sentimentality. If you're out, you're out.
I'd never question his competence as a coach, by the way. He's brilliant and I don't think I'm doing Klopp a disservice by saying that Tuchel is the best we've ever had.
Not sure if his personality changed that much at Dortmund. He did become a vegan during his year off and looked quite thin and sickly when he started work there. Other than that - from what I saw - he seemed the same.
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The decisive spark came when Borussia Dortmund’s team bus was attacked on April 11. Cast in the shadow of predecessor Jurgen Klopp, Tuchel was often seen as lacking emotion, but his humane reaction to the decision that his team would play just a day after the attack won him sympathy with many.
The coach’s criticism of UEFA’s decision was, however, also a criticism of Watzke, and so contrasting statements appeared. The pair’s disagreement spilled out in public over the ensuing week. Tuchel’s disappointment in how the situation was handled continued, yet Watzke insisted that Tuchel had the chance to say he didn’t want to play the game, but never did.
A day before Dortmund’s crucial Bundesliga game against Hoffenheim to effectively decide who would take third (and therefore an automatic Champions League qualification spot), Watzke admitted in an interview with local German media that there had been a disagreement between himself and the head coach about the decision whether to play the Monaco game or not.
Looking back, it’s clear that tiny cracks have been forming for a while. Tuchel’s reaction after defeat to Bayern Munich in the 2016 German Cup Final, stating that Mats Hummels could have been better, seems to have struck wrong chord with his team.
Fan favourite Jakub Blaszczykowski’s departure led to contrasting statements from player and head coach, and the captaincy became a debate for too long. Tuchel has certainly got Dortmund playing better football, but there are signs he’s fallen out with too many at the club.
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https://www.fourfourtwo.com/feature...-tuchel-borussia-dortmund#JuQkMpWSlTUcOHST.99