I've lost 100 lbs twice. You absolutely can outrun a bad diet lol.

It's just a LOT of exercise and counting all of your calories. A 1600 calorie bag of chips is 4 hours of cardio :)

So you didn't outrun a bad diet. You counted calories and matched your diet to your exercise (or vice versa) to get the weight outcome you wanted.

I think some here are narrowly interpreting "bad diet" to mean "lots of junk food". While yes, that's not a great diet, what's really meant is a diet where calorie intake regularly exceeds expenditure, regardless of what you're eating.

Even if you eat only the healthiest of foods, if your intake is too much for what you're burning, that's still a "bad diet".