What are the default permissions for / and /boot on Arch?
So I've messed up by not formatting my partitions on installation and now things are buggy, dbus returns permission denied on starting is one of the prominent bugs at the moment
Good on you for getting it fixed. One of the reasons Linux is a great OS in my opinion is that everything is in the file system and not in some arcane hidden thing. So every problem is solvable without a reinstall if you're motivated enough to figure it out.