Freud's methods are laden down with weaknesses and dangers for all those who would seek his help.
Freud revised and developed his false theories throughout his life. If a meaningful critique is to be made of his work, it must start from where it really hurts. Freud was a life-long atheist; religion was an illusion from whose strictures and promises humans needed to be liberated by science. In his heart there was no room for God; how, then, can Freud's tongue (and pen) give instruction that would be profitable?
He started and developed the myth of mental illness. He used the medical model to explain and try to solve man's moral difficulties. He treated sinners as patients, and irresponsible beings as helpless people, who needed his treatment. He declared them unable to cope with life because of a mental ailment.
But such a stance removes responsibility, whereas God always holds us responsible for all our actions, thoughts and deeds. If it were a physical illness (or a mental illness induced by an accident, toxics, and so on) then we would be prepared to make allowances.
Freud, however, saw his patients as suffering from problems brought about by influences outside their control, by society, by their domestic upbringing, by their environment or by the educational and cultural system. These things do influence us, but we are still accountable for how we respond to them. Frued, however, looked at his clients as sick persons who needed his professional treatment.
The freudian ethic is a lie; it smashes all hope; it accepts man's sinful camouflages, and since it pictures man as a victim to mental illness, fixes him in his sin. Instead of repentance and righteous living, Freud advocated a method of delving into the patient's past so that the blame might be shifted on someone else. But that's no solution.
The Bible, on the other hand, places the onus on each one of us, individually. "Let no man say when he is tempted, I am tempted of God: for God cannot be tempted with evil, neither tempteth he any man. But every man is tempted, when he is drawn away of his own lust, and enticed" (James 1:13,14).
Freud has done untold harm in being instrumental to have ministers of the gospel (who know the real solution) give up their own responsibility to lead men to Christ and find their hope in Him. This they did when as a rule they started to send their church-members to seek professional help from expert counsellers trained in a world-system and philosophy opposed to God and His Holy Word.