You keep claiming the Snooper's Charter was unpopular and went through anyway, but sadly you are wrong:
https://yougov.co.uk/news/2015/01/18/more-surveillance-pleas...
Overall, the UK population has consistently supported stronger surveillance powers for a long time and by a clear margin. For better or worse, we tend to trust our authorities here. And to be fair, most of the time, our authorities do seem to use their powers responsibly, so to some extent that trust has been earned.
One problem with this is that whenever surveillance issues have been discussed in the media and these polls have been carried out, they invariably talk about giving powers to the most serious policing and national security organisations using the powers to defend against the most serious of crimes and security problems. However, the reality is often that the laws allow for much more than that, with many more people getting powers and access to surveillance data, with much less control and oversight than the public might expect, to deal with minor issues where intrusive surveillance is wildly disproportionate, but most people who aren't heavily into tech or civil liberties don't realise any of this at all.