In a medium bowl, add shrimp, minced garlic, and creole seasoning. Rub and mix gently. Add olive oil and mix again.
Bring a large pot of water (salted) to a boil over high heat. Cook the pasta until tender but still firm to the bite, stirring occasionally. Drain pasta. Set aside.
Meanwhile, in a large skillet over medium-high heat, warm 1 tablespoon olive oil. Add shrimp and sear the first side for 2 minutes. Flip and cook for another minute or so, until slightly golden brown. Transfer to a small plate and set aside.
In the same skillet over medium heat, add 1 tablespoon butter. Add onion and cook for 6 – 7 minutes until softened. Add garlic and toss for 30 seconds. Add tomato paste and 1¼ teaspoons creole seasoning. Stir to mix for 30 seconds. Add crushed tomatoes, chicken broth, and heavy cream. Bring to a boil and reduce to a simmer for 5 minutes. Add pasta and cook for another 3 minutes until sauce is thickened and reduced. Taste and adjust with salt or creole seasoning. Toss the shrimp back to skillet and cook for 2 more minutes. If needed, add more broth. Transfer to serving plates, sprinkle with parsley and serve immediately.