He wanted to infect and destroy Neo's world.
I watched a theory not to long ago which posited that Agent smith is actually "the one" and Neo was just a regular human who learn't to manipulate the rules of the matrix more-so than morpheus, trinity e.t.c.
https://www.hooktube.com/watch?v=VkMU1mKdwPI
Annoying voice the youtuber has but it's an interesting theory with a fair bit of proof.
Yeah, I’ve read about that theory.
It doesn’t explain why the matrix gets reloaded when Zion is destroyed, which means Smith (supposedly the One) achieved his purpose.
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