There's a difference between being confident and being arrogant.
That difference typically is in how the person on the other end of that energy exchange is interpreting what they are receiving. One person's vibe or rhythms may create discomfort for others for a myriad of reasons, all of which can create resistance and resentment that is unearned.
The popular answer to that observation is "not my problem", which is absolutely incorrect. How your energy is received is very much your problem since you are the origin point of that energy. If the exchange isn't fluid it will create resistance which is beneficial to no one.
To consider the power of this exchange, let's use the simplest representation of that: electricity.
Electricity is unstructured by nature yet obeys immutable laws that allow it to be utilized. This understanding of how it operates is what allows an electrician to do their job properly and create the desired effect.
Electricity can travel through certain materials without losing its power if there is the right conductivity. The conductivity is based on the material in question's composition as well as the voltage traveling through it. So for an electrician to do their job, they must understand not only what they're working with material wise but how much power they are dealing with.
This type of energy exchange is no different than the one that happens between individuals on a regular basis with the exception that the electrician has come to terms with the fact that he has to adjust based on what's presented.
When mindful of the output and voltage emitted the confidence one wishes to convey has a better chance of being received and processed properly. It starts with the understanding that you are the originator of the energy you wish to receive because it is something we instinctively reciprocate. Using empathy, one can see how a person's actions/words/etc. can be received in ways they didn't intend which can close doors before you had a chance to find out they exist. To circumvent these types of misunderstandings, I follow the advice my mother gave me as a child:
Stoop to conquer.
Simply put, once the need to publicly pat yourself on the back goes away you typically get your rewards. This isn't as much to discourage from celebrating your wins as it is to encourage you to be mindful of how to the winner it's a celebration but to the loser it's gloating. This immediate perception can shift focus away from the actual goal: creating more wins.
To create those wins we must first win the war with ourselves and our own energy.
If you stoop low enough to keep your ear to the streets for trouble and change, then the only thing left to do is conquer your goals.
Sounds fair.