Begin by placing the boneless skinless chicken thighs into a large pot. Add the sliced garlic cloves, finely chopped ginger, white parts of scallions, kosher salt, freshly ground pepper, and water. Bring to a gentle boil.
Once boiling, reduce the heat to medium-low and let the mixture simmer for about 15 minutes. Remove the chicken from the pot and let it rest before shredding it into bite-sized pieces.
While your chicken rests, add in your dried ramen noodles (or curly noodles) along with matchstick carrots into the broth. Cook according to package instructions until tender.
Return the shredded chicken back into the pot along with black rice vinegar, soy sauce, toasted sesame oil, and adjust seasoning as desired. Stir gently to combine.
Ladle the soup into bowls and finish off with green parts of scallions and drizzle with crispy chili oil. Serve hot.