We used to have a lot of "mutual" companies, such as insurance firms, building societies etc., that were "owned" by their customers.
Trouble was that their "customers" got greedy and voted to "demutualise" meaning selling their "shares" to external shareholders and financial institutions for a whopping profit. Now, there are very few "mutuals"!
Same with utilities and "tell sid", whereby the general public were given the option to buy shares in our utilities to broaden individual share ownership, which they did in great numbers, and then promptly sold them to financial institutions for a whopping profit!
As we've seen with the Co-Op, being a mutual isn't always better as it was nearly brought down by bad management/leadership a few years ago.
In theory, "mutuals" and "partnerships" seem a good idea, but in reality, the stakeholders get greedy and incompetent management is still an issue (and they're more difficult to get rid of when no one actually owns enough of the company to force a change in management!).