Be happy about what you achieved
Be happy about what you achieved and do not ruin it with the comparison of the achievements of others. See the achievements of others as complementing and not as juxtaposed. More as a continuation than as something different. There will be always possibility of betterment in what you did. But space for betterment is not the space of belittlement. You did what you could and make the mental space for accepting the novelties by others. This puts you in peace with the present than stuck up in the past with unhealthy sentiments of rivalry. It’s meaningless to make a competition between your past achievements and someone else’s present achievements. Synchronize your concepts with the present realities in harmony.