Oh now I get it! Pick your Poison!

I don't think anyone really wants to destroy the Universe.
The idea is always that some powerful detached maniac wants to end existence.
But no one would ever want that.
They would want to rule. They would want to make others suffer.
They want everything they've always wanted.
They'd want the girl. The gold. The God status.
But in these stories, the hero saves existence.
...Every time.
There is no overwhelming implosion that sucks up the entirety of everything fathomable.
The villain gets a boot in the jaw and the hero gets the girl, the gold, the god status.
The hero never says 'thanks evil villain, without you I'd be an irrelevant lump of crap'.
The hero is dependent on the villain, the hero is nothing without the bad guy.
The villain is the independent creative genius, the villain merely depends on
perpetual existence, the canvas. Why destroy the only thing that gives you possible glory?
They wouldn't.
The problem is that the bad guy never wins, not for long anyway.
A flaw in the tactic.
Design a plan to get what you want. Spread the word, make up lies
make them think you are the good guy. Make them think that your plan is their salvation.
Then implement said plan once you have a strong enough following.
Even this isn't guaranteed to stick, but you might have a long standing empire.
The government is a good example of a successful super villain.
There are just too many villains nowadays. Our hero's are just villains
the villains that we agree with as far as vision goes.