Actually is normal for a 2 years old smart phone or even older to get battery drained.
Some of the problem is like:
1) Too many Push Notification
2) Application running in the Location Services
3) Application running in the background
4) System updated which can also cause a lot too (some applications will need to be readapted, gallery will be smartly re-organised and files will be scanned again to detect security risks)
If your device can still last for a day (or maybe 11 to 13 hours), the device is still consider good.
If you really want to reduce the battery drain issue, you can try also (but it might won't help much too):
1) Put un-use Notification to sleep mode
2) Reduce the brightness of your screen
3) Adjust screen timeout settings
4) Remove moving wallpaper
5) Reduce your virtual RAM (RAM plus) to lower
6) Off your location services for some Application
* If you update to Android 13 in the future, more battery will drain for sure (this is normal).
