(1) The main reason is that ~90% of the things you do in school make zero sense. They happen just because that's the way things have always been done. In this kind of environment, it is really hard to find the motivation and will to succeed.
(2) Very few people actually give a fuck in school, which adds to the dreariness. Many of the best students are just the best at gaming the system. Most professors don't care and are focused on research. The result is that the people at the top of the system are often the people you respect the least.
(3) Grading on a curve can be brutal. You can have an easy class where everyone gets the material, but because the professor wants to have a certain distribution on the test, the standard deviation is tiny. That means the line between success and failure is actually incredibly thin. This means that beating your peers is a lot more important than actually knowing the material well enough. In practice, this forces students to overstudy boring material just because everyone else is too.
Don't drop out my friend. Hang in there.
Just try to remember that life is not like school. In life there aren't tests so much as there are learning experiences. When you program, you're constantly learning, correcting, analyzing, and perfecting until things are just right. This is what makes it so much fun.
I agree with the others here that it would help to talk to the counselor and your teachers. On top of that, if it helps, remember that many others went through the similarly insane rigors of modern higher education to find that in retrospect it was a highly helpful learning experience, if not tedious at times.
Best of luck!
Very rarely will you ever do 100% of what you enjoy in life. And if all you do is what you enjoy, then it becomes ordinary and can lose it's luster.
From my perspective, academics is 'jumping through hoops' to obtain a credential. My strategy for making it through was to find things I enjoyed to use as a reward for completing what I didn't want to do. I would also do research on a topic of interest and figure out how to learn it along with good ways to apply it.
If you are unmotivated, the easiest things in life can still be very taxing.
And if you are depressed, some days you aren't capable of tying your shoes.
If all else fails, remember this...
"he will never amount to anything" - Einstein's teacher to his father.