The people in any job who have been just hanging around and barely skating by will always react in a negative manner when someone competent comes in.
If they can drag you down and affect your ability then their lackings become less readily apparent.
Stay the course. Continue to excel, and they'll be given two choices: pick up their laces or vacate for new competent workers. That ball is in their court, it's not your fault if they drop it.
All that being said, congrats on the success, I'm sure you'll pull through and shine.