Have you tried Dolphin?

It would be fun if your next “I need Windows” OS was ReactOS and have less problems than using Windows.

Have you tried some of the dual panel file managers that run on Linux? What Directory Opus has that is not in other FM?

I think it should be the default if you don’t use parameters. A little usage help and the list of commands (with a “do you want to see the list of commands? (Y/n)” message)