Telling others about your achievements and how good you are is something positive.
The question is, are the lyrics in that particular song at the same time free of any other negative statements?
Bragging is okay as long it is not a cope for low self-esteem.
Because keep in mind, your subconscious mind is always listening and playing along with the input.
It also can see through all your “games” and “acting as if in order to cover something up which you don’t actually believe deep down”.
Yes. These are all counter-productive beliefs.
Any belief that tells your subconscious mind that something is “hard” will also manifest itself this way and will be your personal experience.
This idiology of something being “hard” is fed to the masses on purpose.
Look at almost any YouTube motivational video – they all preach that “you just have to work a little bit harder, and one day you will make it”. This is all very negative anti-success brainwashing for your mind by people who lie on purpose or like most, simply have no clue.
How about manifesting that instad of “hard”, things go easy, smooth, in perfect alignment, always at the right time, always for the benefit of everyone etc.
Check out this thread on “hard work” as well: