We don't know if the task is impossible because Google has no incentive to do it at all, so we can't assume they are really doing their best. They created this situation and they profit from it just the way it is.
Build a better mouse trap etc, if the task was possible, DDG / Bing / Whoever could absolutely dominate the search market by providing a ”no crap results” option
They would only bother to try if they could monetize it, and the only model for that which won't create the same incentives is paid user subscriptions. The market for that may just be way to small for the big guys to consider.
