FFXIV Villains

[Firepower]

Most truly insane villain's don't turn insane until the later stages of the games (or least it isn't revealed to you until then)

I would say FFXIV is too early in the story to start introducing the maniac type villain, people like Caius (FFXIII) Seymour (FFX) Kuja (FFIX) and Sephiroph (FFVII) was they weren't exactly completely insane, they all had well laid plans to benefit themselves.

Sephiroph was a very well respected person until he found out he was just some biological experiment from jenova and from then just decided he wanted to follow his mother's footsteps and become a god. The plan of merging in the lifestream and absorb all its essence when meteor kills the world was pretty well calculated.

Kuja was another biological creation from Garland, he never experienced childhood so really never grew up, most of the time he is just following orders from Garland, he was always meant to be inferior to Zidane so essentially when he found this out this and the fact his lifespan was temporary he wanted to just end everything "if nothing ever exists I can't really die"

Seymour was born to a Guado and Human, so a half breed and designed to patch relations between them both considering his father was the leader of the Guado. It did the opposite and he had to live in exile from Guado for being a "filthy halfbreed" and this made him hate both races, his mother died when he was 10 against Sin, he spent most of his childhood in isolation in a temple. All of this made him long to become sin itself and destroy Spira to end the suffering and sacrifice.

Caius is a very long and complex story but essentially he was given immortality so that he could watch over Yeul (who he loves dearly) who can see the future, seeing the future causes great strain so she always dies very young and is then subsequently reborn again, distressed by millennia of his friend dying over and over, he wanted to end the cycle once and for all.