Push any button to start...never start

How many thousands or millions times this problem must be reported ?

That’s the most annoying because the game I have paid and I am using on Microsoft own hardware doesn’t even start on a regular basis.

But Microsoft doesn’t care since I have paid for it in full.

Any idea except the favourite answer of IT guys i.e. uninstall and reinstall ? Then all history is lost.

Which version of the sim are you having an issue with ?, FS2020 or FS2024 ?

No, your history is not lost.
All your history and settings are kept in the cloud and should be restored with a reinstallation.

Having said that, a reinstall may not correct the issue.
However, this article may be some help:
https://flightsimulator.zendesk.com/hc/en-us/articles/4406039624338-How-to-fix-loading-issues-after-clicking-Play