14 Pro Max or 15 Plus

I know people already asked this but still, I want to get your opinions. Ok so I plan to change my phone by the end of the year. I've been an Android user so far but this time I want to try an iPhone. I already did my research and am planning to buy the 15 Plus but the 14 Pro Max dropped its price. Enough to make me consider buying it instead of 15 Plus. However, according to my research, buying 14PM is a gamble. You either get lucky with the battery or not. Is this a hardware issue or a software one? Or maybe both? Is this fixed? I also watched a YouTube video which says that it's got something to do with the way 14PM users charge their phone. Fast charging should be avoided. So, would it be worth getting the 14PM instead of the 15 Plus? Should I risk getting a bad battery? I don't mind the weight of the 14PM and buying it would give me that 120hz. I don't have a problem with 60hz but it just doesn't feel right to have 60hz on a flagship phone.

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EDIT: So if an iPhone 14 Pro Max has bad battery and its health dropped to, let's say, 85% in just a few months or a year, how many times would you need to charge it per day?