So you don't understand how mass surveillance works? "Big brother" isn't "watching" you in real time, they're collecting and storing all the data they can en masse and having AI look at it for them. I personally object to the warrantless collection and storage of everyone's data.
AI wrongly flags you as suspicious and someone has to take a manual look at all your data.
Why would you want anyone from the government doing any sort of investigation on you? Even if you have nothing to hide it's a breach of privacy and you put a lot of trust in the government.
Big Brother was watching you, but isn't watching anymore.
Because he doesn't even want to know, he wants to forget. He knows if he goes back to look now he's not going to like it, and he can't do anything about it.
That's half true, no one cares about you in particular but they still collect everything to have a database of all thing that could possibly care about in the future, Snowden did a great job revealing that and while it wasn't state driven you can take a look at the Cainbridge Analytica story if you want to know what's possible even if no one ever cares about you specifically, keep in mind that that's even possible with very outdated technology by todays standards!