Rev Dr Gavin Ashenden resigned his position with the monarch last week after he voiced his opposition to a passage from the Qur'an being read in a Glasgow Cathedral.
It's thought he quit after conversations with Buckingham Palace and officials from the Church of England.
He told The Conservative Woman that he felt he had to leave the role because "if you make political enemies, or your face does not fit, or you fail to adopt increasingly secular values" you get left behind.
The Church, he said, was "so politicised that it matters more now that you are a feminist than a theologian".
He encouraged Christians to "leave their church" if they seek to be faithful to the gospel of Christ.
"Demographically and financially it is dying. Spiritually it appears to be on its last legs too," he said about the Church.
"I'm not sure I see much point in a church that just wants to be accepted as a sort of not too irritating chaplain to a secular and hedonistic culture, which is what it seems to be becoming.
"I want to remain a faithful Anglican, but increasingly it looks like that is only possible outside the C of E.
"It has opted for a kind of spiritualised socialism and feminism in opposition to the Gospel of our Lord Jesus Christ. You get new life when you repent. But there is no sign that it is ready to take that path."
The Church of England is in good health financially with its investments making a return of 8.2 per cent last years.
That well exceeded the 2 per cent target set by the Church Commissioners and the fund is now worth £7billion.
In 2016 it was announced that the number of people attending CofE services each week has fallen below one million.