There are only two kinds of cloud regions: the ones people complain about and the ones nobody uses
if you are using hetzner: avoid everything other than fra region, ideally pray that you are placed in the newer part of the datacenter since it has the upgraded switching spine I haven't seen the old one in a bit so they might have deprecated it entirely.
In the early days of cross-region inference, less people were using it, and there was basically no monitoring (and/or alerting) on Amazon's side.
The cross-region and global inference routing is... odd at times.