Isn't it common for phone manufacturers to deliver the "planned obsolescence?" They deliberately make you uncomfortable with your current phone without you realizing it so they can indirectly force you to buy a new phone, for their business' sake.

That's how I see the battery drain issue, and that's why I am never convinced to update my phone.

I thought a bit about it, and I decided it is better to add this in a comment down here - the Mi 11X apparently got about the same update (well, more or less), so even Mi 10 T/Pro users might find this video interesting - https://www.youtube.com/watch?v=6_mJmsbCtvE