People will always talk about other people. Unfortunately, sometimes they feel a need to pump themselves up at your expense. And yes, they may even fib a bit to make you look bad. Don't get too wrapped up in what people say. If you work hard, keep your promises and help others win, their words mean very little in the long run and only serve to hurt their own credibility.
Losers talk too much and accomplish very little.
Have a vision and keep moving toward it. People with vision are rare. People who are committed to their vision and hang on to it and consistently move toward it are jewels in the crown of life. While these people are preciously rare, what they do is very simple. They simple identify what gives their life meaning and forever after that move toward it and share the joy along the way.