Long time lurker, first time poster...and I see a lot of people here asking this question and not being able to wrap their head around the answer. As a graphic designer and someone who was a longtime iOS user (and who recently switched to Android shortly after iOS 7 was unveiled), I would like to hopefully shed a little light on this issue.
The BIGGEST problem with iOS 7 is that they threw the baby out with the bathwater. iOS 6 was a very mature operating system and a lot of it "just worked". And I will agree that it could have used a "slight" faceliftkey word being "slight". The overall interface simply needed some of the gloss and texture removed, and it would have been just fine. Instead, Ive and his group went totally overboard and removed/tweaked more than was necessary. As a result, you now have an interface that in many cases is:
1) too bright.
2) bringing up accessibility problems that weren't previously an issue.
3) degrading the user experience (9 icons per folder page on iPad?).
Additionally, a lot of the ire for iOS 7 is also directed towards the icon design/color scheme, and rightfully so. Apple has always had a reputation for taking the "little things" into consideration when it comes to design. As a graphic designer and a tech geek who uses his phone constantly during the day, it bothers me when I see inconsistencies in the design of an app or iconsomething that iOS 7 is guilty of. For example, the gloss on Game Center (and what is that object supposed to be?), the flat color on Calculator, the gradients on many others, etc.
And there's no possible way to deny itthe fact that Apple has added SO MANY tweaks under Accessibility and changed many of the visuals in the updates shows that they were in the wrong. Remember, this is a company that prides itself in paving the way in the industry and insisting their way is the right way. Unfortunately, Apple's way is a little off right now. As a result, I switched to Android and have been happy with my choiceI am free to change the look and feel of the phone to my liking and many of the apps and games that I use are available on the Play Store. If Apple were to fix many of the design issues that plague iOS right now, I would be happy to switch back. Unfortunately, I don't see that happening soon.