Cook and stir ground beef, chopped onion, and garlic in a skillet over medium heat until crumbly and browned, 5 to 10 minutes. Drain.
Stir drained ground beef, kidney beans, tomatoes, tomato paste, chili, cumin, onion powder, garlic powder, and chili powder together in a large pot over medium-high heat.
Bring to a boil, reduce heat to low, and simmer, stirring occasionally, until vegetables are slightly tender and chili is heated through. (15 to 20 minutes)
Season with salt and ground black pepper to taste.