Over worked managers hold themselves back because they don't delegate. Most managers suffer delegation anxiety.
That is what holding all these clients back and probably holding you back a bit, even if you are not aware of it yet. You got reasons why you are not delegating stuff that you need to be delegating. If you are delegating, you are doing what you should be doing as a manager and leader. You will reap the rewards of a much better life. Here are 7 Reasons Why Over Worked Managers Don't Delegate.