Stop using iOS is the best solution, either from getting a different device or jail breaking your phone. You can never really be private using iOS, you cannot install the add ons you want (because Apple won't let you), and you can't even use the browser you want. Every browser on iOS is really just a re-skinned Safari, because Apple won't allow anything else.

Having said that Chrome will always be the worst possible choice.

Firefox is one of the least bad choices on iOS, and does have some built in privacy features to make up for the fact you cannot install add ons: https://support.mozilla.org/en-US/kb/enhanced-tracking-protection-firefox-ios. There's also Onion browser: https://onionbrowser.com/