Rustic Spaghetti Salad

Name: Rustic Spaghetti Salad
Ingredients: 1 (16 ounce) package spaghetti; 6 tablespoons olive oil, or more to taste; 2 (2 ounce) cans anchovy fillets, chopped; 0.25 teaspoon minced garlic, or to taste; 1 dash balsamic vinegar; 1 dash lemon juice; 1 pinch red pepper flakes, or to taste; 1 pinch ground black pepper to taste