I have updated my note 10 plus to android 10 and after that I did a complete factory reset, even then am facing battery drain issue, heating issue, standby battery drain. And I observed selfie camera picture quality has been decreased and selfie camera pictures appear little bit blurry.
I do not know why Samsung is doing this. I think its a marketing strategy and Samsung wants to force users to upgrade to their new phone s11.
Am downgrading my note 10 plus to android pie, as I had no issues with android 9 pie and am disabling android OS updates.
And also android 10 is not a major improvement over android 9 pie apart from fancy useless app opening animation effects.