UK standard of living has been declining for years.

I don't think complaining and wanting better is a bad thing though. If anything, I often find that a society that doesn't complain and say things like "it's better than nothing" often ends up with something shitty and putting up with it for far too long. Sure, appreciate the fact that we have what we do, especially cuase there were people that fought really hard for it, but we mustn't get complacent.