Is there any way of downgrading from android 16 to 15 andFrom ui 8 to 7 coz this update for some of us with 4gb ram phones....it's performing terribly 

This update has killed my phoneWhat is "UI not responding" please take me back toUI 7, android 15.My phone overheating despite no background running apps, I can't use my phone like before  dimensity 6300 behaving terribly.