Been struggling with the annoying mess that is Outlook (New), too.
Went to look at the Apps list, couldn't find "Outlook (New)", much less "Outlook (classic)".
But I did find an entry for simply "Outlook".
Ooo-err, I thought. If I uninstall that, will it uinintall my normal Outlook(classic), possibly along with all my mail settings?
So I selected the "Advanced" menu from the Apps list, and there found a version number.
Checked my normal Outlook(classic) - completely different version number.
So, I took a big breath, and dselected "Uninstall" (from within the same "Advanced" page).
Half expected my Outlook(classic) to disappear, but no, there it was, still working nicely. Phew...
And if I typed "Outlook" in the taskbar Search box, only "Outlook (classic)" appeared.
Does this mean I'm free of the scourge of Outlook (new) forever?
We'll see...