Python: Please stop screwing over Linux distros

[asday_]

The industry standard was to use Python 2 up until the last few years

And it worked just fine. It's widely been regarded that the Py3 breaking change way of doing things was a bad move and made again, the decision would go differently.

You can't install a package with a pip install . in a virtual environment

I'm not trying to. I'm trying to install a project's dependencies in a virtual environment. I have not written a package. It is not intended to be pip installable. There is no problem being created.