Could you please tell us how you charge (many little charges or like one full charge from 1%) and what you use to charge it?
10 or 12W iPad charger always overnight.
So here goes my story...
I start the day off with 100% charge and at the end of the day (10-11 pm) I’m usually down to around 30-40%. Never below that with my usage.
Some days I might have extreme usage (in car with gps/BT streaming and calls) but those times I put it on the carcharger (2.4A) regardless of what % I have left on the battery.
With that said, I would just keep on using the phone the way it suits you!
Batteries degrade over time, that is a fact, sure by adjusting usage you might be able to extend the life-span somewhat... but is it worth having the added stress trying to readjust to save on something that is unavoidable in the long run anyway.
Each to their own.