This Mediterranean diet study was hugely impactful. The science just fell apart

I'm struggling with the 'what can I eat' question. I'm mediterranean. I've tried plenty of fad diets.

One unorthodox way to check the effect of a diet: "Did you feel any better?"

I'm currently vegan. I don't fell better. The only time in my life when the diet seemed to have an effect I could notice in mood and energy levels was when I was 'raw'.