I Went Over The Edge Of The World

This poem is about how the world has become lost and misled ("Oh the hymns of angels, Suffer over the stench of the 21st century").

Just a few things I don't understand:

1. What is it he says after "A break from the deranged world of..."?
2. What does he mean by "Plotting out the death of art"?
3. What is that middle section ("And I went over ... called your bluff") all about?