Season the chuck roast generously with salt, garlic powder, onion powder, Italian seasoning, and pepper.
Heat olive oil in a large skillet over high heat and sear the roast on both sides until browned, about 3-5 minutes per side.
Place the seared roast into the Crock-Pot.
Add the chopped onions, carrots, and potatoes around the roast in the Crock-Pot. Pour the beef broth over the ingredients.
Cover the Crock-Pot and cook on low for 8 hours, or until the roast is tender and falls apart easily.
Remove the roast and vegetables from the Crock-Pot, slice or shred the roast, and serve hot with juices. Sprinkle with fresh parsley.