Snap Error on startup

I get the following error :

System has not been booted with systemd as init system (PID 1). Can't operate. Failed to connect to bus: Host is down 

im using chroot on a chromebook running kali

It’s unlikely you’ll get it working in a chroot environment.

If your Chromebook is new enough, try setting up Crostini, it uses full virtualisation and is far more likely to work with snaps. It’s also generally the manufacturer preferred route for ChromeOS to access a more traditional Linux environment.