No, the married do not serve God better than youth, because God needs all of us to be his servants and spread his message. Paul tells the message that a person who is single should stay single and focus on God. There is nothing better or worse about being married or not.
In my opinion the service to ones God is not based upon marital status nor is it based upon age. The youth of this planet and their service to their God is no better or worse than the married individuals service to their God because they both serve their God in a fantasy dimension. The super-natural is not served by either the youth or the legally joined.