My dear, this is an interesting question.
The best way to measure your success is your emotions. If you are happy and satisfied, it means that you are successful. Next, look at your team build, how you communicate, and how to help each other. And third, look at how much you have earned. I speak, you succesfull team., And you are successful.
I wish you much luck in your future work, you do not lose the will and energy!