It seems to install its own pip packages, and that's where it barfs due to incompatibility - rules_python is supposed to shadow system rules, but it's not fully compatible, so hilarity ensues.

[Bug]: New install python-pip returns: pip: cannot execute: required file not found #24587 ...

To uninstall the Python package using PIP, you can run pip uninstall package_name, but it depends on whether you want to remove single package or all packages.