I feel like if want to enjoy pixel phone, really is set up the phone and then just hands off and use normally and accept it as it is. They really went 180° from their nexus philosophy. And if you don't like it then at least you know pixel experience is really not for you like how I know Samsung not for me after using their ultra once.
So far I see you're getting frustrated by trying to get your pixel to become the kind of phone you want it to be but if you disable those ai features to squeeze more batt for example then I think it's quite pointless, even for me, to use pixel.
Like even the midrange Redmi note 17 pro max can have 10000mAh on a normally sized form factor no need to worry about battery life anymore.