Why my iPhone 5c (8gb) is very easy to low bat?

Ok so, this is my first time to used an iPhone and my major problem is my BATTERY, I need to charge it everyday, it's very embarrassing cuz I need to charge it every evening, I don't know why, I'm kinda disappointed to the phone, I searched on YouTube on how to have a long battery life and I followed all the instructions and nothing works! Please help me with this, I just want to use my phone in like 3days without charging you know cause my battery is horrible! I'm so sick charging it everyday!

You have to charge most iPhones at least once a day. I have a 6, if I don't use bluetooth or surf much it will last 2 days.

Get a new one

Bring it to a phone shop and get it fixed