Guys, just return it. It's never gonna improve. I have decided to return it, best decision I ever made. Samsung is just selling a scammed device, and they know it.
I'm experiencing the same battery issue. Drops immediately after charging using cord and wireless. Purchased in December. If not resolved I will have to return and purchase something else.
I have had the S20 Fe 4g for couple days now (since 7-1) and i must say I have the feeling it only has become worse. I havent set any battery saving methods because I didnt use those on my previous phone either. That model had a much smaller battery but gave me the same screen-on time. We really need Samsung to address this issue, because it is really bizarre how a phone 'for the fans' can have such bad battery life.