And no-one has mentioned Microsoft's online Sharepoint where the question one thinks to yourself when opening it is "I wonder how much crappier they've made it today". It seems that any time there's a Y in the day they'll change the UI "because they can" - and it's usually for the worst, and as pointed out above, usually to make it work on tiny screens and screw anyone trying to use a proper screen.
And as mentioned above, DVLA - the epitome of a piss poor website where the "designer" has some fetish for wasted space painted white.
Biting the hand that feeds IT
