They definitely overestimate their power. Most of them own 0.00% of the club, but they want to change the CEO of the club. Some of them even want to influence takeover of the club. That's bizarre.
Most of them are just longtime customers of the company, who liked its products, but they don't like them anymore. They are used to the products, and because of the commitment and consistency principle, it is hard for them to stop consuming those products.
Like in any sport, the main product is entertainment. If they are not satisfied with the products, but want to continue consuming the same amount of entertainment, they can purchase the same products (football matches, etc.) from other companies, or they can consume some other forms of entertainment (movies, video games, reality shows, following social media influencers etc.). But that change is not easy for them, and they continue purchasing products they don't like, in hope that something will change soon.
It is not advisable to spend too much time consuming entertainment.