>>68511065find a way to make drawing enjoyable even if it's ugly
all human behavior is driven by motivation. Discipline is a meme in the sense that literally, consciously forcing yourself to do something will be largely unproductive, if not just a failure to begin with. You need to reshape your perspective
For drawing in particular maybe try drawing one thing 10 or 20 times? If identical ugly drawings are side by side maybe they'll seem less cringe to you because it'll be a symbol of learning, improvement