Bungling

Anything worth doing is worth bungling.

Harry made a bungling attempt to catch the ball.

Well, he then decided to manufacture everything as in the human body. I'll show you in the museum the bungling attempt it took him ten years to produce. It was to have been a man, but it lived for three days only. Then up came young Rossum, an engineer. He was a wonderful fellow, Miss Glory. When he saw what a mess of it the old man was making, he said: "It's absurd to spend ten years making a man. If you can't make him quicker than nature, you might as well shut up shop."

Your bungling nearly cost us our jobs.