Tuchel didn't lose this for England in the last 30 minutes.

He lost it over and over again, starting with picking the wrong squad, then picking the wrong first 11, and never having a settled defence. Then being negative in multiple games, where we could only barely beat average teams like Panama, Congo, Mexico, Norway.
Delusional and arrogant manager who turned potentially a great squad into an average one.
I said it a few weeks ago, favouring pace and power over technique and skill was completely stupid.
Just pick a common sense manager who doesn't put square pegs in round holes. Tuchel just did the same things as Southgate, but with a better squad.
Shaw, Maguire, Trent, Palmer all sitting at home, and Mainoo didn't get a single minute.