The cooking is bitter, so you can add some seasoning to the pot. You can add sugar or vinegar or soy sauce to taste.
Sugar is the best and most convenient way to cover up bitterness. Add some sugar and mix well. It will taste better than before and will not be too bitter.
You can also add soy sauce or vinegar to taste, depending on your personal preference. If you like sour food, you can add more vinegar. If you don't like sour food, you can add more soy sauce to taste, and the effect is also very good.