There was plenty of TV coverage of both Wapping and the Miners Strike. I'm not sure they showed a very balanced view of either, having been at both. Today I thgink with the need to feed 24 hour TV News, I would hope that it would be more balanced.
It's interesting the perception that people wouldn't instantly say they support Police. My circle of friends and acquaintances would say that, and do often that they do support Police. No they don't like being hit with speeding fines, but they also know that my feeling is that if they can't see a big yellow box in a road marked with warnings of speed cameras they shouldn't be driving at, let alone above the limit!
Now, I'm sure that not every circle of friends isn't necessarily reflective of the population, mine included, so looking for something that supports, or debunks your theory, I found this
https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/116417/hosb1011.pdf
Try page 88, where it shows increasing confidence in Police, not declining. It doesn't go back 30 years, because annoyingly they changed the questions in 2004!
If you mean PS Smillie, please remember he was acquitted of assault, as was ex PC Harwood of manslaughter. In fact most police officers charged are acquitted. Now that should tell people that most are in fact innocent of the wrongdoing they are all too often accused of. But by the time it gets to the case getting chucked the damage is all to often done.
Oh sorry, I forgot, Bobbies walking beats. I honestly can't recall the last time I saw one of those, yet there are far more PC's than there were when I walked the streets. Its wrong, very wrong, but the blame isn't entirely with Police Officers for that. Some is granted, but not all.
FDor example cuts in other services mean that the only one left is often the Police, they are the catch all. So take mental health, they should be in the care of the NHS, they don't take very good care and they go on the trot. Police get involved and that requires manpower, often 2 PC's tied up for hours waiting for the NHS to take them back in. Or sitting there doing 24 hours watches on someone who because no one else will take them has to go to a place of safety and that has to be a police station.
Doing 'welfare' visits on people at risk, because the NHS wont. investigating rubbish, like "She called me a slag on faceache". the list goes on. But instead of complaining to Government, or the daft PCC's, people just moan, "Oh we never see a Police Officer anymore".