Heat a large stockpot over medium-high heat. Add the ground beef chuck and cook, breaking it apart with a spoon, until it is evenly browned and fully cooked. Drain and discard any excess grease.
Add the chopped onion, red pepper flakes, and 1/2 tbsp of the ground cumin to the pot. Cook, stirring frequently, until the onion is tender and fragrant.
Pour in the condensed tomato soup, chicken broth, and crushed tomatoes. Stir until the beef mixture and tomato base are evenly combined.
Add the chili powder, ground black pepper, and salt. Stir well to distribute the seasonings throughout the chili.
Reduce the heat to medium-low and allow the chili to simmer for 30 minutes, stirring occasionally to prevent sticking.
Add the drained pinto beans, dark red kidney beans, and light red kidney beans. Stir gently to combine.
Season with the remaining 1/2 tbsp ground cumin and cayenne pepper to taste. Adjust the seasoning as needed.
Continue simmering for an additional 30 minutes, or until the chili has thickened slightly and the flavors are well developed.
Serve warm with desired toppings or side dishes.