OMG I literally went through the whole google search possible and watched a couple of videos and guides, THIS IS THE ONLY SOLUTION!!! Thank you for being a hero T_T

Honestly I would say give it a week or two for it to learn how you operate the phone. See full answer here https://www.reddit.com/r/samsung/s/LdmHl7nO0M

Battery life usually improves, sometimes by a lot, over the first couple of weeks as it learns your habits.