Are you not recording any activities / using any GPS?
Obviously everyone has different use cases and experiences so I don't want to disregard other experiences it just seems so far out of reach for me compared to the experiences I have had across 5 or 6 different models of their watches over the years.
I have mostly used different iterations of the forerunner range and a Vivosmart which was fucking trash IMO.
That makes more sense I guess as I know the GPS is a major battery drain. Maybe that model is also better with battery in general as I know for sure none I have ever owned would last that long just using it as you do. :)