Just my quick opinion, but it would seem to me, that if I have to disable features that are advertised for the watch, just to get the advertised battery life, or if I have to disable features that I use just to make it through the day, I would probably have to re-think my obsession with the watch. I am wondering just how much I must disable my wonderful "do everything" watch to get it to last the day..
The other day, I took a 30 minute outside walk, and the watch, (Series 4, 44mm) dropped 17%. I used GPS, and internal HR, nothing else, no streaming, no notifications, etc. In fact, the phone was in Airplane mode.