Not everyone will be as positive or as cheerful as you are.
That is OK, as you can continue to go about your business knowing that these are people that you do not need to interact with moving forward.
Do not compromise your personal brand because of negative jokers who bring no value to your goals
As you continue to win, it will be most important to maintain your composure.
Folks will find ways to try and knock you down, but you will brush it off your shoulders and keep charging like the Rhino that you are!