Preheat your oven to 355 degrees Fahrenheit (180 degrees Celsius).
Pat your pot roast dry and tie it with butcher's twine if it's not even or it's falling apart.
Spread a very thin layer of mustard on it and season well with salt, pepper, garlic powder, and smoked paprika on all sides.
Over medium heat sear your roast in your dutch oven on all sides, about 3-4 minutes per side until you get a nice browning on all sides. Remove your roast to a plate and add in 2 tablespoons of olive oil. Add in the onion wedges and crushed up (or sliced) garlic cloves and sauté them, scraping the brown bits from the bottom of the pot. Add in the 1 cup red wine and scrape the bottom of the pan very well.
In a measuring cup add the gravy ingredients and mix well. Return the roast to your pot, nestling it between the onion slices, pour your sauce ingredients over them, and roast in the oven with the lid on for about 1.5 hours.
After the 1.5 hours, add in the potatoes and carrots trying to nestle them into the sauce and onion mixture. Roast uncovered for another 2.5 hours or until the potatoes and carrots are fork tender and the meat shreds easily (about 205 degrees Fahrenheit (96 degrees Celsius) internal temperature)
When it's done, remove the butcher's twine and shred the meat and serve.