Sorry to here your disappointed in your battery life! My IPhone 14 Pro Max had a similar issue and I found some relief by limiting the background refresh of certain apps. You can do this by:
Going to Settings > General > Background App Refresh and select Wi-Fi, Wi-Fi & Cellular Data, or Off to turn off Background App Refresh entirely.
You also have the ability to see battery usage by app and try to troubleshoot, you can see that by:
To see an overview of your battery level and activity for the last 24 hours and up to the last 10 days, go to Settings > Battery.
When you tap one of the time periods above the Activity graph (Last 24 Hours or Last [X] Days), you can see which apps contributed to your battery usage during that time period, and the proportion of battery used for the app.
To see how long each app was in use on screen (the dark blue bars) or in the background (the light blue bars), tap Show Activity. Under each app, you might see these usage types:
- Background Activity means that most of the app's battery usage — such as playing music or tracking location — happened while the app was in the background.
- No Cell Coverage and Low Signal means that your device was searching for a signal or being used with a low signal.
- Connected to Charger means the app was used only when your device was charging.
