Welcome.
With normal use of a phone, Screen uses most battery charge, the more so if you use a high brightness setting.
Post a screenshot of your battery usage stats after a day's use for further opinions.
Also, joining as a member and engaging in the S6e forum would be a good idea.
I usually get 12 hours of battery life with 3+ hours of screen on time. I play games for 30 min too. The battery life on S6 edge isn't that great. With QHD display and only 2600 mAh, dont expect getting a lot of screen on time.
In first time I charged the phone I waited to finish and switch off by itself and after that I charged it until 100%with a slightly use... Is it a problem perhaps??
Charge it to 100%, then another 30 minutes. Due to the way we measure State of Charge, the instant it reaches "100%" it could be charged to 90%. Also usage has a LOT to do with battery life. If the screen is on full brightness and the mobile signal is weak, you can kill the battery fast.