are Giant Warrior Pirates the Giant army?

Supposedly the giants have the strongest army in the world (according to BigMom), yet we have seen the giant warrior pirates lackluster performance. Of course they tanked the egghead buster call quite well, and even played with battleships like Toyboats, but this pirate crew does not seem worthy of a Yonko Bigmoms attention. The giant pirates do not use Haki and only brute strength, like their giant archers sinking boats with .... giant arrows. Their captains Dorry and Broggy may only use Haki with their strongest attack -- Hakoku sovereignty.