I get that it has a small battery,but what the hell are you doing with your phone for it to last barely half a day??? It must be glued to your hand non stop.You need help.
I carry two phones, one of which being an iPhone X. I use both phones equally, and my iPhone X doesn’t last a long time. Phone world be almost dead way before the end of the day from a 100% start. If I have a 7 or 8 am start, phone would be at around 20-30% at around midday. My other phone would last me pretty much the whole day from a 50% start from the same starting time.