For about 10 years now I have been reporting potholes via the Fill That Hole Web Site, this and other similar websites check the location of the pothole and report it to the relevant Authority. This is very useful when you don't know which authority is responsible, so for example if the hole is probably outside the Stockport area, then is it Derbyshire or Cheshire if it is local, or any other authority if you come across one elsewhere.
Last year I became aware that the most Council's, including Stockport, changed their reporting system which prevented Fill That Hole etc reports from being directed to the relevant authority.
Currently for Stockport go to
https://www.stockport.gov.uk/start/report-a-pothole-damaged-road-or-pavementFor Cheshire go to
https://www.cheshireeast.gov.uk/highways_and_roads/highway-services/road-condition-and-repairs/road-condition-and-repairs.aspx Stockport have said they will try to allow Fill that Hole acces to their reporting system, but can't guarantee it, meanwhile the problem has been taken to the Ministry of Transport, but don't hold your breath.
However if you think our roads are an an appalling condition, then this is one of the reasons where hundreds if not thousands of complaints never got to their destination. so you will have to use the relevant Council's web site if you know which is responsible.