People put up with all kinds of crap when it's the best option available. They're OK with it until something better comes along. In this case, a smartphone with a day of battery life trumps a flip phone with a week of battery life just because it can do so much more. You know what trumps a smartphone with X battery life? One with X+1 battery life, as long as it still fits comfortably in a trouser pocket. With the behemoth-screened phablets that are common these days, I think it's reasonable to make them a little thicker and a little more useful.

My phone's about 3 years old now. Even when it was new, I couldn't use it indiscriminately and expect a full day of charge. If I want to have it available for critical purposes like emergency calls, it's literally not usable in the way that I'd like to use it. I don't think that it's even remotely unreasonable to advocate for better battery life, and I think it's only a slight exaggeration to call current phone battery life "unusable".