I know what you're thinking: "Rocket Raccoon defeats Thanos? Yeah, OK bud." Honestly, I get it. I've read just about every theory on how the Avengers are going to defeat Thanos in the next installment, and Rocket seems to be one of the least likely remaining characters to get the job done.
But then I came across the following theory from Reddit user tpklus, and it has me reconsidering that assumption.