I'm surprised to hear that. Ruby was the first language in my life/career where I felt good about the dependency management and packaging solution. Even when I was a novice, I don't remember running into any problems that weren't obviously my fault (for example, installing the Ruby library for PostgreSQL before I had installed the Postgres libraries on the OS).
Meanwhile, I didn't feel like Python had reached the bare minimum for package management until Pipenv came on the scene. It wasn't until Poetry (in 2019? 2020?) that I felt like the ecosystem had reached what Ruby had back in 2010 or 2011 when bundler had become mostly stable.
Bundler has always been the best package manager of any language that I've used, but dealing with gem extensions can still be a pain. I've had lots of fun bugs where an extension worked in dev but not prod because of differences in library versions. I ended up creating a docker image for development that matched our production environment and that pretty much solved those problems.
Authelia? Authentik? Keycloak? (These are the three I see a lot about.) Something else?