Not at all. This is just one aspect of his administration. President Trump has done a phenomenal job on so many other issues: the economy, border security, national defense, foreign relations, etc). Just because he made some lousy picks, doesn't define his presidency. Furthermore, he has had the courage to correct mistakes rather than just letting them fester. He's gotten rid of Preibus, Tillerson, Sessions, Mattis, Kelly, Bolton, and others. That is a positive trait from the business world where you're not afraid to fire people for not getting the job done.