Uncontrollable to what? Weather, seas, stability ... ?
I do find my tins to be HARD to control in heavy winds, say small craft warning or above, as those winds just grab the bow and turn it against the wind.
A friend has a Duranautic DN14 V-hull with a tiller controlled 'Rude 30hp on it, along with a folding bimini top. He told me on SUN (as he had it up, as the sun was so brutal) that he needs to move the 'trim pin' in 1 position while that top is up, as it creates sooooooo much life, that is raises the bow and changes to the boat's trim.
Remember, fore to aft trim on a small boat is critital!