Your OP smells of yet further ignorance. Evolution has nothing to do with light, dark, hot, cold, etc. that's like saying the theory of gravity doesn't explain why we get sick.
An organism does not need to understand why it can do what it does. No organism ever "created" it's eyes. The evolution of the eye is well documented and explained. Again, read a damn book.
Many of us are not defending evolution because of its sentimental value or anything. It's not something that needs to be defended when its facts are available. Contrast that with the bible, which is defended solely because of what it means to people, and yet a Christian must start making excuses for it right from the beginning.
If you can disprove evolution, you are welcome to do so and collect your Nobel Prize. If someone were to come up with a better explanation for the diversity we see, and the facts were there to back it up, I'm sure most of us would readily accept it. Darwin released "on the origin of species" over 150 years ago. While today we have a much clearer picture of the theory than he did, the main statements of his theory have stood strong every since. I say, well done Darwin.
People don't adopt a belief in evolution just so that they can drop their belief in god. They believe it to be true because that's where the facts lead. All of your objections (at least the ones that actually pertain to evolution) are easily explained (not excused) and are important components of how it actually works. Just saying "how can that come about be evolution!?" Is not a legitimate argument, it is an argument from personal incredulity. In your case, it is an argument from personal ignorance.
The information is all there and readily available for you, you just need to read a book that wasn't written by equally ignorant people. You have been fooled.