01 - In a small bowl, combine smoked paprika, garlic powder, onion powder, kosher salt, black pepper, and chili powder. Mix thoroughly until evenly blended.
02 - Pat the chuck roast dry and rub the seasoning mixture evenly over all surfaces of the meat, pressing gently to adhere.
03 - Transfer the seasoned roast to the slow cooker, fat-side up.
04 - In a mixing bowl, whisk together barbecue sauce, beef broth, apple cider vinegar, brown sugar, and Worcestershire sauce until smooth and well combined.
05 - Pour the sauce mixture evenly over the seasoned beef, ensuring the roast is well surrounded by the liquid.
06 - Cover the slow cooker and cook on the low setting for 8 hours, or until the beef is fork-tender and pulls apart with minimal effort.
07 - Carefully remove the roast from the slow cooker and place on a cutting board. Using two forks, shred the meat, discarding any large pieces of fat or gristle.
08 - Return the shredded beef to the slow cooker and stir gently to coat all the meat in the sauce. Serve hot on burger buns with coleslaw, or over rice as desired.