واذا حشر الناس كانوا لهم اعداء وكانوا بعبادتهم كافرين

وَإِذَا حُشِرَ ٱلنَّاسُ كَانُوا۟ لَهُمْ أَعْدَآءً وَكَانُوا۟ بِعِبَادَتِهِمْ كَـٰفِرِينَ

Shirk is a grave iniquity because man sets up such beings as equals with his Creator and Provider and Benefactor as having no share whatever in creating him, nor in providing for him, nor in bestowing the blessings on him, which he is enjoying in the world. There could be no greater injustice than this. The Creator’s right on man is that he should worship Him alone, but he worships others and so deprives Him of His right. Then, in whatever he does in connection with the worship of others, otherthan Allah, he exploits many things, from his own mind and body to the earth and heavens, whereas, all these things have been created by Allah, the One. And man has no right to use any of them in the worship of any other than Allah. Then, the right of man’s own self on him is that he should not debase and involve it in punishment. But when he worships others, but his Creator, he debases his ownself as well as makes it deserving of punishment. Thus, the entire life of a mushrik becomes zulm in every aspect and at all times and his every breath becomes an expression of injustice and iniquity.

So it’s justified you get to hellfire for eternity

إِنَّ ٱللَّهَ لَا يَظْلِمُ مِثْقَالَ ذَرَّةٍۢ

Indeed, Allah never wrongs ˹anyone˺—even by an atom’s weight. lit., the smallest particle of dust (ⱬarrah) 
Quran 4:40

Thank you for sharing this reflection on the grave sin of shirk and the consequences of associating partners with Allah. Your description of the injustice and disrespect involved in attributing partners to the Creator, Provider, and Benefactor is a powerful reminder of the fundamental principle of Tawheed in Islam. The emphasis on the Creator's exclusive right to worship and the consequences of deviating from this path provide a stark warning against actions that lead to eternal punishment. The verse from Surah An-Nisa (4:40) serves as a clear reminder that Allah, in His infinite justice, never wrongs anyone, not even to the smallest degree. Your reflection underscores the importance of understanding and upholding the Oneness of Allah in all aspects of life. May this reflection serve as a reminder for us to always seek the path of Tawheed and avoid the grave sin of shirk. Jazak Allah Khair for sharing this profound reminder with us.