If you want to stick with Chromium-based browsers, you could try Vivaldi. I am a Firefox user myself but Vivaldi is my backup browser for those rare occasions where I have issues. 95% of the browser is open source, with the remaining 5% being comprised of the closed source UI. Vivaldi has a pretty reasonable privacy policy, an inbuilt ad-blocker and is a 100% employee owned company. It supports all major operating systems and has a sync feature so you could use it as your main browser across all devices if you wanted.
It’s actually 4 years now. Still terrible for the price, of course.