I actually trust Joe Random Webmaster a lot less than Google. Google has a lot of power, but from past experience, I've run into many privacy issues with malicious or misguided website owners while I'm unlikely to run into a serious one with Google.
At least assuming none of their employees goes very rogue and starts leaking data en masse, or has a personal vendetta against me or something. I know something like that happened once (https://www.wired.com/2010/09/google-spy/), but the odds are probably still pretty low.
Yes, but my adversary in that case is the NSA. Even if Google (or other similar companies) didn't exist, NSA would try to get that data one way or another.
Also, though it may be naive, I believe Google does not intend to cooperate with the NSA any more than they're absolutely legally required to.
At least assuming none of their employees goes very rogue and starts leaking data en masse, or has a personal vendetta against me or something. I know something like that happened once (https://www.wired.com/2010/09/google-spy/), but the odds are probably still pretty low.