In defense of Tea here, a proper package manager (as opposed to something that just downloads prebuilt binaries or installers directly from vendors) that runs natively on Windows is nonexistent and (I think) unprecedented (outside of POSIX emulation environments like MSYS2 and Cygwin).
(The closest thing to a real package manager in terms of use cases (used for installing things like command line tools and compilers) on Windows is Scoop. But it doesn't use a repo built from a ports tree or a collection of source packages like apt, Homebrew, MacPorts, Nix, etc.)
Tea isn't neglecting a common platform in its problem domain, and by even planning native Windows support it's actually pretty exceptional.
> We already work on Linux, macOS, and WSL; soon we’ll support Windows natively.