Practice should be ugly. It shouldn’t sound or look good. The point of it is to improve a certain skill or technique.
It’s different from playing. When you have practiced something enough, then you can play it. But up to that point it should be thought of and treated as practice.
Playing is worthwhile too – otherwise there would be no point in practicing. Just don’t confuse the two.
Finally, in order to move something from your practice category to your playing category, practice not until you get it right, practice until you don’t get it wrong.