I hear this kind of thing a lot when it comes to playing guitar. Especially, when young ones want to play as well and as fast as their idol in 3 days and feel frustrated and discouraged when they can barely make their fingers fret the proper notes/chords. Usually what the answer they hear is.... "Slow the heck down and learn to practice accurately.... then speed will come."
I find that leatherwork teaches patience. It takes a huge amount of time and practice, along with a measure of artistic ability to get to the level of the pros. I can tell you that like anything worth while, it takes practice. Lots and lots of practice. Our leather idols didn't learn this over night and probably not in a year either. They had mentors to guide them, and took the Time to learn and practice their craft.
Like Cheryl says... we have a tendency to tackle things beyond our current abilities. Perhaps it's time for you to slow down and choose practice projects just beyond your current ability. That is to say... if you can turn out an awesome belt... choose something slightly more challenging. All too often (and I've done it too) people jump right into the deep end and try to do the most difficult project when in reality they are just learning. Then frustration sets in because they didn't meet their own expectations, due to a lack of ability. Then, if they don't quit, 5 years later they attempt the same project with some trepidation and find it turns out great. The difference in this case is the years of practice they've gained.