If even Isambard Kingdom Brunel can't get the engineering right, you KNOW the project's too big a leap.
I have heard of a few experts saying "Isambard Kingdom Brunel was a great engineer... as long as the thing he was designing didn't move"
Obviously this isn't totally true because the Great Britain and the Great western were huge successes.
The Great Eastern was just too big for its time.
She was built in 1854-1858 but her length was only surpassed in 1899 by the RMS Oceanic of the White star line, and her Gross tonnage was only surpassed in 1901 by White star's RMS Celtic!
Maybe if she had been a little smaller and the launch was handled better than i am sure she would have been just as successful as the Great Britain and Great Western.