I've been thinking about this for quite a while.

Back in Stormblood, the devs said that he would be one of the most hated antagonists considering his attitude toward his servants and even his own family. But that didn't stop people from praising him as a decent villian. It got to the point where his unexpected popularity got him into Dissidia of all places.

Now when Shadowbringers came out, people starting to now agree with the devs about Zenos, albeit for different reasons such as boring personality, or not being in the same league as his Great-Grandfather.

I mean, what's with the sudden change of view on Zenos all of a sudden?