I am hanging/spinning "forever", on a regular basis (more often than not at the moment I am writing this), trying to log into the game (to character select screen), enter/exit the game world with a character, or changing "zones" )either via wayshrine, or transitioning through a doorway/etc). Basically, at any point a loading screen is presented to me, progress ceases.
The game is rapidly becoming unplayable.
I understand ZOS is at the mercy of their service providers, as are we all, but their whole capacity to do business is under threat. They might want to consider escalating... either to consult legal counsel preparatory to holding their service provider(s) accountable for failing to meet basic QoS requirements, and/or expanding their infrastructure to multiple POS service centers (with dedicated capacity provisioned between them), etc.
The game won't survive if people can't access it.