People all have different interests and different things that excite them. I think objectively there are some legitimate criticisms about both Disney and Universal (Disney's lack of updates for the past decade and Universals reliance on screens), but a lot of peoples differences just comes down to their preferences.
I agree with earlier posters that Disney bores me to death. I am also a mid-20's guy with no kids, so Disney doesn't really cater to my demographic. And while I have some nostalgia from visiting as a kid, I'm not a pixie duster so I approached the park rather objectively. I went to Disney a couple years ago and never really had any 'fun' other than at Animal Kingdom (cause I am now of the age I can appreciate animals, and Everest was a fun coaster) and then drinking at Epcot (now that I am old enough to do so, but Epcot sans alcohol seems boring). Hollywood Studios is a complete train wreck that I spent maybe 2 hours in, and Magic Kingdom was just too busy to be enjoyable. I also waited for over an hour for the Seven Dwarfs Mine Train only to be massively disappointed and couldn't get a single restaurant reservation the entire day.
With the exception of someone buying my ticket, I would never willingly go back to Disney World. Why would I pay for the insane stress from having to plan everything out 60-90 days in advance just to ride boring rides like Little Mermaid (which btw, I couldn't even make out the songs the sound was so bad) or Figment?
On the same trip I went to Universal Studios and absolutely loved it. I didn't have to pre-plan anything, no reservations needed even to eat at the Harry Potter restaurants, and I could ride every single ride without outrageous wait times. Sure some of the rides overly rely on screens (Transformers ride is awful, and while I didn't like Minions my mother loved it), but are entertaining enough to ride through at least once. And a bunch of the rides are amazing enough to go multiple times. I rode Forbidden Journey 6 times I loved it so much, and rode the Mummy 4 times.
We all have out preferences of what we like and dislike, if you didn't enjoy Universal that's no problem. I do appreciate it being less crowded than Disney World