Sometimes I only get advertising results for some searches. That's when I switch to ddg where I'll often get what I'm searching for.
I think this is kind of a trend that might be advantageous to alternative search engines. I remember that at some point google would give very accurate results as long as appropriate search terms/options were used. This seems to be no longer the case or at least the results are getting more and more inaccurate and polluted with random garbage that at least on the surface has little to do with what is being actually searched for.