I've never used AdGuard but you can customize uBlock Origin to fit your needs and block specific things for specific websites. uBlock Origin is commonly used as a default in hardened browsers which would help you fit in with the crowd even more (although I realize you said you weren't going for anti-fingerprinting, just something to consider)
- I switched to using Grayjay Desktop rather than my browser for YouTube
- If you need a userscript manager, Violentmonkey is an open source alternative
- Proton Pass has an app, yes less convenient without the autofill but better for privacy not to have the extension
- Personally, I would just sail the seven seas