Its clear that Google is milking every single one of its users using their browser, since they have access to your computers.
Probably this is the “vector” they use to gather the most info about users, apart from Android maybe.
There's Chromium and there's Ungoogled Chromium[1]. If you're looking for (some) independence from Google, you want the latter. Or just avoid it altogether and use other browsers.
I wouldn't recommend Blink-based browsers (Brave, Vivaldi, Opera, etc.) You're still indirectly giving Google power over the web by using their engine.
[1] https://github.com/ungoogled-software/ungoogled-chromium
For example, the Chromium packages provided by the vast majority of Linux distros disable security features like CFI (check your favorite distro's x86_64 Chromium package build log and look for the "is_cfi" argument). I think Arch is the only exception.
ungoogled-chromium has similar problems https://qua3k.github.io/ungoogled/
If you are going to use a Blink-based browser, I would recommend just using the official Google release, or maybe Edge or Brave if you trust the organizations behind them. Otherwise, just switch to Firefox. It has its own problems, like being overall less hardened than Chromium, but it's far less user-hostile. And regarding security, for browsing untrusted sites, I think you should always virtualize the browser since they're all routinely exploited anyway.
Why would they even do that?