Given the "broadside" I am now delivering

"Some excellent people have worked at ONDCP and have done some good. (I will do them the courtesy of not naming them, given the broadside I am now delivering.) By and large, however, ONDCP has been an obvious hindrance in efforts to form and communicate effective policies, even in areas that fit the office's narrow policy agenda."

What does this "broadside" mean in this context? This word has so many meanings.

broadside noun

1. large flat surface:

2. strong spoken or written attack:

3. U.S. printing large paper size:

4. nautical ship's side:

5. ship's guns:

6. firing of ship's guns: