In a medium sized bowl, add the corn, tomato, red onion, avocado, and 1 Tbsp hot sauce. Mix gently, then set aside.
Place the beef in a large bowl and add 2 Tbsp of the hot sauce then mix until fully incorporated. Separate the beef into 4 balls of equal size, then press down gently with your hand to flatten out the patties. Sprinkle each side with the salt and pepper, then use the back of a spoon to spread the remaining hot sauce onto the burger.
Prepare a grill at high heat, brush the grate down with oil and grill each burger for 3 minutes on one side before flipping, then another 3 minutes for medium rare, and around 6-8 minutes for well done.
Place each burger on a hot bun, then top with queso fresco, a heaping scoop of the avocado corn relish, and a couple slices of serrano pepper. Serve immediately.