As an Estate & Letting Agency, your Negs and Valuers will never appreciate how much you do for them and the agency business, yet nor should you expect them to do so.
You see, this business is your baby.
Of course they don't work as hard as you, again, because this is your baby, your dream, this is your path. You have to be mature enough, exercising huge EQ skills, as a human being to be able to drive your business (and yourself) forward without the need affirmation and endorsement for your efforts from your staff.
...... because if it were easy - everyone would be running an agency