Dry the chuck roast with paper towels and coat it thoroughly with olive oil, salt, pepper, garlic powder, and onion powder.
If you like, brown the roast in a hot skillet over medium-high heat, cooking each side about 3 to 4 minutes to deepen the flavor, or skip this to save time.
Place the roast (browned or not) into the Crockpot.
Combine the beef broth, Worcestershire sauce, and soy sauce in a bowl, then pour this sauce over the beef inside the Crockpot.
Cover and let cook on low heat for about 8 hours until the beef becomes very tender and easy to shred.
Remove the cooked beef and let it rest for 5 minutes before using two forks to pull it apart into bite-sized pieces.
Return the shredded beef to the Crockpot to soak up the cooking juices for a few minutes.
Split the hoagie rolls and, if desired, melt the provolone on the rolls under a broiler for 1 to 2 minutes.
Fill each roll with the juicy shredded beef and serve with a side of the au jus for dipping. Garnish with fresh parsley if you like.