In a medium bowl, toss the shrimp with chili powder, garlic powder, sea salt, and black pepper until evenly coated.
Whisk together the shredded cabbage, apple cider vinegar, and a pinch of salt in a separate bowl to create a quick, tangy slaw.
Heat the olive oil in a large skillet over medium-high heat.
Add the shrimp to the skillet and cook for 2 to 3 minutes per side until they are pink and opaque.
Squeeze the fresh lime juice over the cooked shrimp and remove the skillet from the heat.
Warm the corn tortillas in a dry pan or over an open flame until they are soft and pliable.
Assemble the tacos by layering the crunchy slaw, chili-lime shrimp, and sliced avocado into the warm tortillas.
Garnish with fresh cilantro and serve immediately.