Usually the first version that we get from a huge update have this kind of problem, but they will fix this on the next release. Maybe mitigate the problem by reducing animations and closed the background apps for now until they fixed it. Send some feedback as well to samsung so that they will get notified.
True, but most first releases always have some kinks to fix in the next update. Just wait for the next update. Even my Note 20 Ultra 5G got a bit faster in using power. But it got better in the following weeks.
