I totally agree with your point about the benefit of Chrome without the sketchiness of Google, I made pretty much the same point.
What was disappointing about Safari for you though? In my experience Safari has the best performance and the best efficiency (higher on benchmarks + easier on battery life). Even just scrolling on sites is visibly smoother on Safari.
Safari also integrates perfectly with iCloud KeyChain and bookmark sync, and I can hand off web pages between my iPhone and my MacBook Pro pretty effortlessly too. 3rd party browsers miss out on that nice iOS integration.
Safari has all the nice OS integrations for sure - no denying that. But as a stand-alone browser, it's been left behind in everything but the rendering engine. It looks incredibly out dated for a start - this was my biggest surprise coming into macOS with no knowledge of it outside of iPhones and Apple Watches. Finder and Safari look like products from a decade ago. These beautiful Music apps and things, and Finder is sitting there with the "back in my day..." face on it. It's weird. (Although Finder does have some nice features, as does Safari).
The Safari extension support is poor, and the available extensions are generally not as good as Chromes. Since Brave and Edge are built on the Chromium engine, they've inherited all these amazing extensions too. Because of this, the customisation is pretty poor compared to other browsers.
The biggest UX failure is the tabs. Tabs which must always take 100% of the width, making it more movement to switch between them with a mouse. The lack of icons in the Bookmarks toolbar, making it harder to identify at a glance. And despite being wider, the tabs aren't as tall, making them easier to miss. It's just a UX nightmare compared to the other browsers.
Developer tools, Edge and Firefox are moving the bar on those. Edge is adding custom development tools (3D DOM) and integrations with Visual Studio Code. Firefox CSS Grid viewer is *amazing*. Safari is sitting with the bog standard webkit tools. It's a bit meh. I check my sites work in Safari, but I never use it for development. Edge and Firefox win there.
I got around the password syncing by using LastPass and 1Password. All other browsers bookmark sync to iPhone apps (Chrome, Brave, Firefox and Edge all do this - Brave does it without an account, which is cool).
Chrome is great but creepy
Edge is better because it's Chrome but less creepy
Brave is even better because it's Chrome with zero creepy
Safari is...also here.