Heat olive oil in a large pot over medium heat. Add onion, red pepper, and green pepper. Cook until softened, about 5–7 minutes. Stir in garlic and cook 1 more minute.
Add ground beef, Italian sausage, and andouille sausage. Cook until browned, about 8–10 minutes. Drain excess fat if needed.
Stir in salt, pepper, oregano, basil, and red pepper flakes. Add tomato paste and cook 2–3 minutes to caramelize.
Add crushed tomatoes, tomato sauce, bouillon water, bay leaf, and sugar (if using). Stir well and bring to a simmer. Reduce heat, cover, and cook 30–60 minutes, stirring occasionally.
Cook pasta in salted water until al dente. Reserve 1 cup of pasta water before draining.
Remove bay leaf from sauce. Stir in 1/4–1/2 cup pasta water to adjust consistency. Toss pasta into sauce until well coated.
Serve hot with Parmesan and fresh herbs.