Have you actually read the article ? It tells a different story:

They wanted Darden to liquidate all of Olive Garden's real-estate holdings and declare a one-off dividend that would net investors a billion dollars, while literally yanking the floor out from beneath Olive Garden, converting it from owner to tenant, subject to rent-shocks and other nasty surprises.

They wanted to asset-strip the company, in other words ("asset strip" is what they call it in hedge-fund land; the mafia calls it a "bust-out," famous to anyone who watched the twenty-third episode of The Sopranos)

The giant slide-deck making fun of Olive Garden's food was just a PR campaign to help it sell the bust-out by creating a narrative that they were being activists* to save this badly managed disaster of a restaurant chain