The relationship between training intensity and food quality is one most gym-goers have backwards.
Training harder increases your body's demand for high-quality protein, micronutrients, and anti-inflammatory fats. It does not grant permission to eat poorly. The two variables move in the same direction.
A diet built around seed oils, added sugar, and processed food creates a pro-inflammatory recovery environment that slows adaptation regardless of how well-designed the training was.
You cannot train your way out of a diet that works against recovery. What you eat after training matters as much as the session itself.