First, set your Instant Pot to SAUTE mode. Then, pat your pot roast completely dry. Season roast with a good amount of salt and pepper.
Add in the olive oil and sear your pot roast on all sides until browned. Set aside.
Add more olive oil if necessary and then add onions and celery. Sauté for 3 minutes. Stir in garlic and tomato paste until fragrant, about 1 minute.
Stir in red wine, scraping any browned bits on the bottom of the pot.
In a measument cup, combine the beef broth and Better than Bouillon. Stir well to combine.
Pour in the beef broth to the Instant Pot. Add in the chuck roast, rosemary and thyme. Stir well. Close the Instant Pot with the lid, and seal the vent. Hit cancel, then cook on high pressure for 60 minutes. When the time is up, do a QUICK RELEASE by moving the valve to venting to realease all the pressure (steam). When the float valve drops, you can safely open the Instant Pot.
To the instant pot, add in the carrots and potatoes on top of the pot roast. Close it again with the lid, and cook on HIGH PRESSURE for 3 more minutes. Then, do a quick release.
Transfer the vegetables to a serving platter. Using tongs, remove the pot roast to the same serving platter and shred it with 2 forks into large chunks. Save 2 cups of the cooking to make gravy.