Speak for yourself. Besides, all-or-nothing privacy is a false dichotomy. Giving out less personal data is still better than giving out everything, and you don't need 100% privacy to be unprofitable to advertisers.
Beware that, on Arch, "once you've got it set up" can be a loaded statement. Once your OS is running and all your programs reinstalled, there will still be a dozen little configuration files somewhere that you don't know about and that will annoy you until you spend the time to problem solve. If you let those problems linger, it can lead to a "struggle never end[s]" situation. Part of the beauty of Manjaro is sensible defaults. But if you want to try out Arch, you should. It's not hard; it's just annoying for a while.
When using a pre-configured Arch derivative, I really only bother to back up a few folders in /home, e.g. ~/.config, ~/Downloads, ~/Documents, ~/Pictures, ~/Music, maybe also .bashrc if I added a bunch of aliases. Everything else is easy enough to reinstall.
DuckDuckGo might be more private, but it won't solve the SEO problem. I know they have some of their own trackers, but in practice duckduckgo is basically a front-end for Bing.
Speak for yourself. Besides, all-or-nothing privacy is a false dichotomy. Giving out less personal data is still better than giving out everything, and you don't need 100% privacy to be unprofitable to advertisers.