Haha I had a similar problem with argparse so I built a declarative cli and I documented the hell out of it, I added all the recipes in the README. For me it's just ctrl+f in the README and I get what I need. So far it's worked well and people contributing to another project using it haven't complained.

https://github.com/Woile/decli

But nowadays I would recommend something like typer: https://typer.tiangolo.com/ it's quite nice and has autocomplete built in.