My experience has been completely the opposite. I liked my iPhone 5 when I first picked it up (a week after launch) but it couldn't hold onto an LTE signal. Apple replaced it but the issue never quite went away. The battery life drastically decreased after the first 10 months of owning it, I had to charge my iPhone on my way home from work everyday as the battery would get down to 10% during an 8 hour workday (without doing much on the phone). The update to iOS 7 made things way too slow for my liking and the color scheme (I think TouchWiz is just as bad) looks like it was from a kindergarten bedtime story book. My experience with the iPhone 5 (along with the constant problems my boss had with his) was enough to deter me away from Apple.
My experiences with my S5 haven't been perfect either but at least Android 5.0 actually sped up my phone whereas iOS 7 did the opposite for my iPhone. I do miss some of the things about my iPhone, mainly compatibility with Bluetooth audio devices. I don't miss having to shell out $500 on contract just to get a phone with a decent amount of storage.
Everyone has their likes and dislikes. I've had quite a few iPhones over the years. Typically I had a generation or 2 behind what was current. Not sure what provider you have, but with a contract with at&t is only $200 for a current new iphone. The only time I experienced any problems was when I had an older iPhone and ios was updated which it slowed it down. As for battery, I never experienced any issues until the end of 2 years, at which point I would need to charge it about every 1.5 days instead of 2 days.
I never experienced as many problems as I have with the S5. My wife has an S5 also and has the same problems. We both decided to give the Galaxy a try and see how we liked them after owning iphones for many years. My biggest worry was cosistency. The iPhone typically runs smooth and doesn't 'degrade' with use. No need to get rid of apps that slow it down, no cleaning caches, no virus scanners. Everything just runs really well and smoothly.
The S5 has some cool features, it just doesn't operate very well.
My worries came to fruition with the S5 unfortunately. My wife was more positive about the phone but is now getting annoyed with all the little problems she keeps having. Here's what I didnt need to do to an iphone. Remove apps that sap up speed, no bloatware, no virus scans. Remove battery due to freeze ups. Internet crashing and internet freezing. No need to do maintenance to the phone to try and keep it running smoothly or quickly. It was pretty much worry free. It just ran smoothly with very few hiccups.
The image processor is better on the iphone, which is why the low light images are better. S5 pictures in daylight look more colorful, which is why many think the pictures look better. If you take 2 images from an S5 and an iPhone and zoom in, you'll see the difference in image quality.The S5 is less detailed than an iPhone image. The best way I can try and explain it is, compare an image taken with a digital single lense reflex camera compared to an image taken with just a digital camera. At first glance the images may seem pretty close. Look closer and the quality pops out.
You can do this just by going down to a local electronics store and playing with the camera on the iphone.