Sudhanshu Ji Maharaj considers Shiv ji to be the Supreme God where as in Durga Puran, Shiv Ji himself says that he is the son of Durga and is thus not Supreme.
Shiv puran describes the birth of Brahma, Vishnu and Shiv from Kaal. It clearly proves that Brahma Vishnu and Shiva are in birth and death. These are not immortal.
Sudhanshu ji provides Maha Mritunjay Mantra of Shiv Ji to his disciples. "Mritunjay" means one who has won over death. When Shiv ji is himself claiming to be in birth and death, then how can his worshippers become free from it.
Shiv Ji himself says that he worships some other God. Who is that other God? Please watch the video below to see the full account.
This proves that Sudhanshu ji is not a complete saint as he considers Shiv ji to be immortal and Supreme which is opposite to what is mentioned in our Holy Scriptures.