Your comment is aggressive and uninformed.
I have an iPhone 6. So does everyone in my office. All but one of us pine for our 5/5s - they were, in our opinions, far superior in usability for a one-handed device.
The thing is, we could just go back to them, but then the 6s will come out, or the 7, and eventually, you have to either move to a new platform (Android maybe, but the options in high-end devices in smaller screen dimensions are limited if available at all, and we prefer iOS the operating system, so it's impractical) or suck it up and endure the ever-forward march towards bigger screens.
Consumers don't necessarily want bigger screens as an absolute. Having multiple sizes available is great, but the baseline being so big is not necessarily "what consumers want."