B-b-but they are awesome cheap angry blades of doom!
That are slower than 75% of all other ships. Seriously, they're slower than
frigates and they insist on "bouncing" off their target so they end up moving in the opposite direction of said target for a moment, which insures that 90% of the time, they don't land more than 1 hit.
And they're melee units, so they don't break off when their target is effectively out of range (i.e. target is faster and more than 1 unit away)