Joplin is the least bad I could find so far.
The editor on the Android side is extremely basic, and they have run into trouble bringing the necessary improvements. I’m guessing there may be no easy way out other than rebuilding the Android app from scratch.
There is no WYSIWYG, so good luck managing Markdown on a regular mobile keyboard: editing something as simple as a to-do list is a major inconvenience.
If you go with Joplin, you’ll probably find yourself doing the bulk of your editing work on a PC.
Their web clipper is functional, but not great. BTW it needs a server running, to which the add-on connects.
Unlike Joplin, Simple Notes doesn’t explicitly support synchronization, so in order to have notes created inside the app synced automatically, you’d have to set up Syncthing to synchronize its own folder under /sdcard/Android/Data, which I never tried, so I don’t know if, how well it works.
Alternatively, Simple Notes can open files from the file system, like an existing Syncthing share.
The plus side is that Simple Notes can manage To-Do lists without having to deal with formatting directly.
OTOH regular notes are limited to plain text, and there is nothing like Notebooks to organize your files, your notes will simply appear as tabs, so there is a limit to how many it can comfortably accommodate.