Some paintings are duds. I find the reasons why are fairly repeatable:

1. Not establishing strong relationships between the areas in the light and the shade

2. Chasing the light, especially changing the sky after the color relationships have been set

3. Overworking

4. Trying to save a painting by adding details

5. Being lazy mixing colors and putting a big area of color down without it being the correct luminosity

Did most of these things on this one 😁