Actually I never make a good estimation, so i just multiple 3 now. I also believed in hack/ship cycle, but after several rounds i found the product became unmai

Actually I never make a good estimation, so i just multiple 3 now. I also believed in hack/ship cycle, but after several rounds i found the product became unmaintainable and it's harder and harder to add new feature. Does this mean I need to improve my coding skill to make this cycle works ?