The difference of course is that McDonald’s hired a marketing and PR firm to design a successful marketing campaign as well as a cohesive branding strategy that integrated its online and television advertising with an update of their store architectural design.
Musk on the other hand is basically a wrecking ball destroying Twitter. He is not doing a very good job of reinventing the company and likely scared off any future employees who may want to work there, while being the target of a large class action lawsuit against people who were illegally fired.