In that context, having all packages be “system-wide” made sense. All the virtual env shenanigans won’t ever fix that.
Sorry, but you'll need to explain this a little bit more to me. That's precisely what virtual env shenanigans do - make it so that your environment isn't referencing the system-wide packages. I can totally see that it's a problem if your virtual env tooling fails to work as expected and you can't activate your environment (FWIW, simply old python -m venv venv; source venv/bin/activate
has never let me down in ~10 years of professional programming, but I do believe you when you say that Poetry and Conda have broken on you); but assuming that the tools work, the problem you've described completely goes away.
Fascinating. This would frustrate the hell out of me - if I'm trying to get better at something, the last thing I want is enforced wait-time between practice attempts! Still, I'm glad you've found other games that you enjoy more rather than being influenced by the Internet's collective fan-boner for FromSoft.