Some parts are extremely Linux-centric.

I'd argue the better parts of systemd (it's not all bad but there's a lot of low-hanging fruit for all of us to gripe and bicker about) are the imaginings that came from launchd. That for sure was more UNIX centric than "linux" in particular.

You're right that the criticism "just become windows" seems weird - if anything else one should just say "get a mac" since that's where a lot of the launchd ideas originated.