That's normal bro
Completely normal, Display will always take up the majority of the battery life (unless you are running graphic intensive games or a program that is terribly programmed).
There are plenty of 3rd party products out there to boost your battery life.
Hyperion, YESSO, Anker (Aker?) have batteries that are double the capacity of the factory ones. There is also ZEROLEMON battery that is 3 times the capacity
(If you don't mind bulk this is the best for battery life).
You can buy the factory capacity battery (3200 mAh) for relatively cheap as a back up as well.
I have several and my favorite is the ZEROLEMON but I don't mind the bulk and in fact its more comfortable to hold.