This is what I think: You cannot be 100% private, but you can be 95% private. Most of the tracking I want to avoid is from websites, mail and my devices OS.
With ublock origin in advanced mode, thunderbird + Protonmail, Linux (I'm dual booting and also have a windows VM for the things not working on Linux) and a VPN I can reach a satisfying amount of privacy without wasting too much time and effort. I'm also hosting an unfederated matrix server for private communications but I rarely use it.
To have better privacy than this I'd need a lot more effort, but the return wouldn't be big enough, so I'm good. The only other thing I'd like to do is switching to a phone with grapheneOS or something like that.