I agree, Microsoft needs to fix the bugs, and it shouldn't take years to resolve what seems to be a simple issue.
Especially since this contravenes Australian legislation where I live, which explicitly gives people the right to access, copy, edit if necessary, or remove if necessary, their personal information that is held or controlled by a third party.
In my case I couldn't delete a personal file sent to me by a solicitor (lawyer) in 2013 by email, which I recently opened in my new Word app.
And after at least an hour trying to remove the file from the app, followed by half an hour or so googling for answers and reading Microsoft support forums, I was advised (after another half an hour or so on chat support) to contact someone from 6 years
ago, whose company may or may not exist anymore, and ask them to find an old document and unshare it, is not acceptable (and what if the person did not want to unshare it?).
So, if what you wrote is true, and deleting all data or rooting the phone, or contacting the original file creator to "unshare" it as I was advised by Microsoft, are the only effective ways to delete a file, then that is woefully inadequate.
Therefore I have asked the chat support agent to notify the person(s) responsible to address this legal issue, and I have been told that it has been forwarded to the right personnel who, according to the chat support representative, should contact me regarding
this problem.
I hope they do something about a problem that, according to the forum has existed for years, and give users a reasonably practical way to delete files from their Word app.
I really did not expect such poor app design from Microsoft, and the fact that it wasn't fixed as a matter of priority, totally confounds me.
Ps. Thanks for the advice, but after just one use, I have no intention of using the Word app on Android in the future, at least not until this problem is resolved.