Bring a large pot of lightly salted water to a boil. Cook angel hair pasta in the boiling water, stirring occasionally, until tender yet firm to the bite, 4 to 5 minutes. Drain.
Heat olive oil and butter in a large skillet over medium heat. Add onion and garlic; cook until onion is transparent, about 4 minutes. Add tomato, olives, Chardonnay wine, leeks, lemon juice, capers, salt, and cayenne pepper. Bring to a boil. Mix in shrimp and simmer until pink, about 10 minutes. Stir in heavy whipping cream and cilantro. Serve on top of angel hair pasta.