Are you referring to Google's search interface or Google Apps, or any other Google service?<p>I don't really have any complaints about the search, only thing sometimes bugging me is G+, especially the Android App. Some features just seem to be hidden or only reachable in Ways no User would ever imagine (ie the 'Party Mode' feature, which really is pretty cool, but just so unreachable).
Getting a business to appear in the places listings. It's impossible to edit your own profile. It all stopped working when the business pages merged with Google places. There's no support. It's utterly terrible.