Seriously, just stop (or use Linux)

Notepad is still fine. You can disable markdown and the AI stuff.

I use Macs at home, but use Windows 11 at work. I actually use a combination of Notepad and Sticky Notes daily (well, not on the weekends). It’s fine.

One thing I want it to do is stop telling me a file is not saved if I change something and then change it back. The unsaved indicator (the dot) annoys me.

None of what you describe here is fine.
But that’s not notepad. It’s notepad.app.