The problem is that right now you are talking to someone who’s been using android phones for over 10 years ( Samsung, LG, Sony, Huawei, Honor, Oneplus, Xiaomi etc) And the best battery life on any android is probably Huawei/Honor because of their aggressive ram management. And yet even those phones can’t do 5 days on a single chargeIt is your right to believe in what you want. I am telling you that with my usage (which is rather specific and not typical) this phone can last 5 days.
And in terms of exaggerated claims well people get what they deserve. When iOS users that have never used Android talk to me how iOS is awesome, no bug and offers the best battery life out there I can only laugh. Tunnel vision at its finest.