You might like to know that the first one is very close to an existing comic book called Punisher kills the Marvel Universe, which as the name implies revolves around the Punisher killing all of the super-heroes in the Marvel Universe. Also there’s a book called Steelheart that has a relatable idea of super-heroes being dicks and people revelling against them. The Boys also comes to mind although I haven’t watched the full series not read the full comic. And finally only tangentially related but Wanted (although the movie is based on the comic the only thing in common is the title) is another comic book that approaches the “what if” scenario of someone wiping out the super-heroes, although the story starts after they’ve been wiped out.
For the second one the other answer already gives you a spot on movie, but also I, Robot the movie is very close, and a lot of Asimov books also touch on that base.
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