Things change from release to release. It is always a good idea to read the Release Notes and also this page to make sure that your sources.list is configured correctly.

Have you cleared your cache? I had to to see the changes.

What else would you expect but instability when you play on the bleeding edge of "unstable" (sid)? What you are experiencing is the norm . . .

FWIW . . . I get to bios with F12. Depends on the MB . . . .

Right click on the "tab" bar and tick the box for the menu bar.

What exactly do you mean by "couldn't remove systemd at all"? Perhaps THIS?

Are you aware that there are images specifically for raspberry pi 4 HERE?

https://gnuinos.org

Oh . . . but it did! News "sources" have an obligation to verify information before blabbing about it. Passing the buck is not an excuse for not doing your homework. Sadly, such journalistic practices are common these days. Truth is the casualty . . .

If not you, who? Don't you want to be part of the solution?

Why on earth would you "upgrade" from daedalus (currently in testing) to "ceres" aka "sid" (unstable)?

Please have a look at https://www.devuan.org/os/releases to familiarize yourself with Devuan releases.

The folks at Devuanpup "Daedalus" woof-ce are welcome to post to our derivatives section and interact with Devuan users. If it is well-received, it will be added to the official derivatives list. We do appreciate your letting us know about Devuanpup but someone actually working on the project should be talking directly to us if they want that to happen.

I try my best to understand what you are trying to communicate but it is not easy so apologies for any misunderstanding. I have probably missed the mark again with this post.  Sigh . . .