I think it’s a phrase mostly used in the UK (especially with the first word spelled the way it is, so please don’t “fix” it), but it’s certainly applicable here. Here’s the definition from The Cambridge Dictionary: “To be unable to choose because there are so many possible good choices.”
So. “Bill Gates reveals the ‘greatest mistake’ he’s ever made.” You can click on the link right away, and see what the man himself thinks it was, or, before you do, you can unburden yourself here. You know you want to. Have at it.