The picture was of a tumblehome hulled French pre-dreadnaught. The tumblehome design offers a ton of stability in regular circumstances. But when hulled, they also take on water very quickly and lose much of their stability and reserve buoyancy. This is more or less a guaranteed quality on tumblehome hulls as compared to similar ships without such a hull design.And the invincibles blew up at Jutland so obviously all British battlecruisers were tinder boxes waiting to blow. Except no because they were older designs fighting in combat they were never designed for.
Likewise Bouvet was a small and old ship which had initially been built for fighting other battleships on the high seas. Not the Dardenelles. Also comparing mine hits without getting into the particulars is like deciding which car is safer in a crash by the sound of it's engine.
The layout of the ship, position of the strike itself, crew quality (I doubt the French had their A team aboard even more than the RN) and general material condition of the vessel all play a role.
Bouvet was hardly the most powerful battleship to ever roam the seas, even when she commissioned after a lengthy build period. But that's hardly a fitting comparison to demonstrate how terrible the ship actually was.