Resign? That's the obvious answer right?

I take full responsibility for completing task assigned to me. So resign?

Yes! He failed.

You gotta love a hedge that removes all meaning from a sentence.

It doesn't though, it's a common english expression to state that the object has extremely high value.

No, it's a common english expression to imply that while avoiding any accountability.

That's even more absurd. It's not about "avoiding accountability" it's about putting superlatives into proportion. Is it "avoiding accountability" for your friend to say that he's going to take you to one of his favorite restaurants in the city? Is it "avoiding accountability" for your boss to say that this is one of the most important applications to the business?

Also, marketing departments don't usually do this, they just say "we're the best product in the market" and define best in some ambiguous way.