In the first year, you only get to deduct 20%. But in your second year, you get to deduct 40% (20% from the first year and 20% from the second year). In the 3rd and 4th year it's 60% and 80%. And so on until you get to steady state of 100%.
So, no, it is not "really bad" for you. You as the owner might not make as much money for the first year, but you will be at steady state in a few years, and you get to deduct the salary for years after they leave.