Is the statement "I have committed sins, to You I complain, my Master, O best of prophets" considered shirk (polytheism), and is it forbidden to repeat it?

The aforementioned book contains superstitions and polytheistic acts (shirk), including attributing poems to Imam Abu Hanifa and Imam Al-Shafi'i that call for seeking intercession (istighatha) with the Prophet, peace be upon him, and the author's assertion of the permissibility of seeking intercession with prophets, saints, and righteous people, whether living or dead. These actions are considered major shirk that expels one from the fold of Islam, because repentance, seeking help, forgiveness, and lodging complaints are due to Allah alone. The verse (And if, when they wronged themselves, they had come to you) pertains to the Prophet's life, peace be upon him, and seeking intercession with him or others after his death is shirk. All creation is poor before Allah, and He alone is the Rich, the Praiseworthy. The Prophet, peace be upon him, possesses neither benefit nor harm except what Allah wills. Supplicating and seeking what only Allah can provide is permissible only from Him, Glory be to Him. The Prophet, peace be upon him, said: "Indeed, intercession is not sought from me; rather, it is sought from Allah."