This seems weird, what mirror are you using? Maybe the mirror is broken and you need to update your mirrorlist.
Updated mirrorlist to 2019-10-01 and selected all australian mirrors and then had to disable arnet, now all goodish
P.S. STOP using -Syyuu, since the double y tells pacman to force download databases even when the server says there is no update, and the double u tells pacman to downgrade any packages the server claims are old.
noted and done
If you used a plain old -Syu, then you would almost certainly see five days worth of "[repository] is already up to date", which would be a definite red flag that something is wrong. Now that you used -Syyuu, we have no idea whether your pacman installation refreshed the databases because the server said they needed to be refreshed or because you told pacman to ignore the freshness. Been using Syyuu almost since I started using Arch, first time I noticed any badness with pacman
thanks