If i dont remember wrong, in UA they clearly say or explain that Azmuth created the Map of Infinity like the only physical key to this three-dimensional or 4D/5D place...
4 episodes of Agreggor Arc are about how Agreggor and Ben try to find the pieces of the Map of Infinity to open the breach to that reality.
And if i remember rigt, Paradox was also in some way into this and i will say that he do what you say.
Agreggor is one if not the only good villain of UA, in UA we get only 2 main villains: Diagon and Agreggor both are really cool and are surrounded of secrets and mystery.
The Highbreed were also cool, along the DNAlien are a really nice concept, but the execution of the concept let a lot to wish. Better development less plot holes and they also dont have the strange tone around Diagon or Agreggor of mystery.
But in Omniverse we get Khyber, Malware, Incurseans, Albedo, Zs'Skyar, Lord Transyl, Viktor, Kevin, Dr. Animo, Rojo, Charmcaster and Forever Knights back in the line.
So i guess i love what Omniverse did to Albedo, i love Malware, Galactic Monster Arcs, Charmcaster Arc and of course my favorite Original Series ones: Dr. Animo, Rojo and The Forever Knights.
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I never liked Vilgax, not because it wasnt good, but because it was really a badass moderfucker, the kind of guy that never fail and for me like AF/UA begin to make Vilgax the only villain i started to get bored and doubt of Vilgax like the badass moderfucker he was before.
Until Omniverse i begin to believe he has become a big failure and a joke, because he was defeated only in AF 4 or 5 times in a row. In the OS he was defeated 3 times and there was a lot of space between them and even worst the 3 times he almost won, in his first battle he defeated Ben easily and was going to cut his arm.
In his Revenge he again won and got the Omnitrix, but Kevin give time to Ben to try to get back the watch and it the Secret of the Omnitrix, Ben needed his most powerfull alien and the biggest deux ex machina in all the series to stop him.
In AF Vilgax was defeat by Ben easily by the same alien he alredy fight againts like 3 or 4 times and he defeat him 2 of that 3 or 4 times. Vilgax plan for 5 years his revenge and was defeat in less that some hours.
Later he was defeat in Primus because he believe become a giant Vilgax after stole the Omnitrix would make him win?
He later become really stupid and some way heard about Zs'Skyar and was stupid enough to release him, something i know the real Vilgax would never had done, ever.
And later he betray Albedo, stole the Ultimatrix, for some reason believe he needed the Omnitrix when alredy the Ultimatrix was an Omnitrix and even worst the fandom has believe for years that the Ultimatrix was most powerfull that the Omnitrix or even the Perfect Omnitrix so da fuq? Vilgax is freacking retarded in AF?
So yes 4 defeats in a row in a really stupid way, because he alredy had the Omnitrix in his wrist "for the first time in forever" (Sorry for the Frozen quote)...
In UA at less we get less Vilgax but lose in a really stupid way, but i dont know i guess i dont care.
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I prefer the type of Villains that have a nice Arc, Vilgax always have been the regular and typical nemesis, no offense because he is a big part of the mythology of the show.
But i like more villains like Dr. Animo that have a reason to do what they do or like Charmcaster that have a really good character Arc through the 4 series. Even Malware or Albedo, or Zs'Skyar/Viktor. The best example is Kevin 11 and how it passed to be Kevin.
Or villains that have a orgasmic character design, like Rojo, Diagon, Agreggor, DNAliens, Khyber, Forever Knights. Because this villain or have a really cool design or have a really strong mythology and mystery around they.