I think the problem is that people always, without exception, hate UI/UX change, and companies know this and have learned to just ignore the objections of their users. Every single change to the Facebook UI/UX, every single change to Windows UI/UX, is met with an enormous backlash from users--"I just want it to look and work like it used to!" Then the next redesign comes around, and lo and behold, now people are attached to the current design that they previously hated, and now hate the new design. Tale as old as time.
I've never been like this. I've actually really liked virtually all of the widely panned UI redesigns over the years: iOS 7, every version of Windows, every evolution of Facebook.
However, there have been 2 redesigns that even I didn't like: the Digg redesign, and this Reddit redesign. Both are objectively bad. We know what happened because of the former. It remains to be seen what will happen due to the latter.