I don't think Blackboard is an SPA (it's just very slow server rendered), but it's UI really is terrible. I wrote a script to scrape my course materials when I was at uni, it was that bad.
Blackboard has to be the worst software I ever had the misfortune of having to interact with. How come universities spend millions of dollars every year on such a steaming pile of crap?
[1] https://www.lawyersgunsmoneyblog.com/2014/01/christ-i-hate-b...