In a medium mixing bowl, combine the ground beef, garlic powder, and salt. Mix until well combined, then set aside.
Place a large skillet over medium heat. Add the avocado oil and heat until shimmering.
Add the ground beef mixture to the skillet. Cook until browned and crumbled, about 8-10 minutes. Set aside.
In a separate bowl, whisk together the mayonnaise, ketchup, maple syrup, dill pickle relish, dried minced onion, crushed red pepper flakes, and salt until combined.
In a small bowl, mash the avocados with lemon juice and salt until creamy.
In the same skillet, add the sliced red onions and cook until lightly charred, about 3-4 minutes. Set aside.
Divide the romaine lettuce among serving bowls.
Spoon cooked ground beef over the lettuce.
Arrange cherry tomatoes, pickle chips, bacon, sautéed red onions, and guacamole around the beef.
Drizzle the special sauce generously over the top and serve immediately.