So I narrowed it down it's battery on 1440p setting it's like a 40% worse than the last UI if you change it to 1080p you get what we used to get at 1440p which is about 10% an hour like if you're at 50% you should get 5 hours to 6 hours depending on what you're doing that's what we used to get at 1440p but for some reason I have to lower the 1080p to get the same battery life I did at 1440p before the update
Have you tried clearing the cache partition and run galaxy booster from good guardians and report this issue to samsung, so they can see what's eating the battery
