Unfortunately yes… I tried everything… no way, so I installed off line with XFCE.
Later on I installed KDE Plasma, removed most of XFCE, then tweaked KDE, and it was fine.
As I mentioned I’m naught by nature, so I messed up the whole thing.
Reinstalled Again (offline XFCE) BUT
This time I did it BTRFS as per @QAP advice.
To my surprise it booted in less than half the time.
I’ll go allover again, install dropbox, dolphin (fore file search)… timeshift and BackInTime of course. (or I don’t need them in BTRFS? Sorry, I’m not that techie)