Every login I've ever done into the Azure portal is like the upstream describes: an absurd number of redirections and refreshes that leave you wondering "is it supposed to work like that?"
I've also encountered strange bugs, like asking to log into tenant A and getting logged into, instead, tenant B. In a loop, effectively locking me out.
The exact quirks and bugs seem to come and go, I presume as the code is changed & updated.
Sure, but Azure also exposes an extremely large array of knobs and buttons that put the tenant admin squarely in control of what "login" means in the first place: the kinds of authentication allowed or required, by whom, under what risk profiles, for which applications, etc. If you feel like it is screwed up there is, as likely as not, action that it is the tenant admin's — not MS's — responsibility to take, to fix it. I don't know what to tell you about refreshes, that's just how Oauth works mostly. I'm tempted to take a video of myself logging into the Azure portal right now just to ask what about it is so weird.