Oh battery performance is fine, it's actually the users who are the problem. I see
Well, yes. If you run your battery down, then you just ran your battery down. A battery lasts longer if you don't use your phone quite so much. These things are fairly obvious, really.
You can't really ask to never ever run out of battery on your phone, regardless of how much you use it. That way we'd have smartphones with ipad pro-sized batteries costing half again of what they do now if not more, and even then you'd still have some vulture-necked mofos managing to burn it all in a single day, constantly staring down into their phone screens.
Look heres my point, it's very simple; the iPhone display should not light up when it's in my pocket. It's pointless.
And your phone would always know it is in your pocket, and say, not on a table in a dark room? Phones aren't omniscient. I would think the screen lights up so you can read Siri's interpretation of your query and its response, and interact with it if necessary. The screen turns on in your pocket in case you want to haul your phone out and read what it says, or poke at a map or whatever.
Anyhow, since you seem to have survived thus far with the battery consumption you experience right now, is this really such a problem?