Policing per se isn't pointless, it's a necessary social function, but what are police forces/police services for? They used to at least show willing in terms of preventing crime, but nowadays? Crime in poorer areas is pretty much unchecked. You'll get a visit, some security advice, and a crime number if you're insured, and that's it. The police forces have pretty much ceded any role in tackling anti-social behaviour to local authorities, and a lot of them just go through the motions of engaging in stuff like Community Safety partnerships.
Most of the stuff you mention the OB doing is stuff that was done, usually more effectively, by town constabularies, where the local coppers were either elected, or they were appointed by the local authority. They were more effective because they knew the people they were policing, and could use community shaming as an effective tool to minimise or stop DV, theft and drunken disorder, and while they were committed to "upholding the law of the land", they weren't at the beck and call of Whitehall. How smoothly do you think your local policing is going to run when 30% of the coppers in your area are seconded to the Met for the duration of the Olympics?