That doesn't need to be sarcasm, because it's true: at its core, Google's search is a method of finding information, not a method of directly ascertaining truth. It's not really possible for it to be a truth engine, and if you realize that, it's not even a flaw. You're left with a way of finding information you will need to evaluate for yourself, which is fine.

The problem is in the presentation: Google's tools in general, not limited to search, present themselves as though they can identify truth. That's the flaw, the lie, if you prefer.