So I got a Galaxy M20 3 days ago, and I didnt update it until yesterday. It was perfect with android 8.1. I really liked the usage and the looks of UI. Yesterday I updated to One UI and my phone sucks now. Even when sliding up for my apps, I can feel it lagging. My charge dies very fast now. Like yesterday I used it with %100 charge for 5 minutes but after the update today I just unplugged it and didnt use it but it was %98 after just 3 minutes. This update is so bad, any ways to make it better or get back to 8.1?