Why was Moby-Dick so unpopular in the time the novel was written?

Let me see...

There's a gay wedding in it.

Queequeg liked to sell human heads to people.

The book's about killing whales.

The language in Chapter 64 ("Stubb's Supper") is really stereotypically "black."

Oh...and except for Ishmael, everyone on the Pequod dies.