I don't really understand your reply and perhaps you would like to expand. People complain about the police for a number of reasons, perhaps because legitimate Police Powers, actions or procedures have not been properly explained at the time or because of the unwillingness of the complainant to change their mindset or ingrained ideas about how the Police 'are'. However, as I have outlined above - if a legitimate complaint is lodged and a Police Officer has acted improperly then it will be investigated. Some people make malicious complaints about Police Officers which are totally unfounded.
Some people seem to think that the Police work as a large, insular and conspiratorial body which is totally unaccountable. This is completely untrue and is an idea promoted by certain parts of the media and in the mindset of persons with an anti Police agenda.
People in this country should be thankful of having an honest, approachable transparent and accountable Police service, which is completely contrary to the 'service' which you would receive in some other European countries, let alone the rest of the world.