Arch User here. What's wrong with the packaging system! It's the best! Pacman ftw! It's intuitive (pacman -S for just sync instead of a sudo apt-get [install|update|whatever] makes so much sense if you think about it)! It's lightweight! And stable! Because pacman has no dependencies it cannot break packages it depends on which happened to many times to me on *buntu (requiring complete system reinstall).
Granted, I'm currently looking into Nix and NixOs, which is the next generation of packaging and how it should look nowadays.
Pacman is better than the others for sure. It's just not yet where it should be (something like nix).
But furthermore there is a lot of software packaged as .deb binaries that cannot be used with arch.