There is nothing fundamentally wrong with WeWork's core product. Users are generally big fans of their services, they have huge brand recognition and are basically synonymous with co-working spaces, and while the need for corporate office space is drastically reduced post-pandemic, the flexibility that WeWork provides is exactly what many companies want.
The problems with WeWork are nearly entirely with their capital structure. They expanded way too fast, they signed many leases that would never have been profitable (often in bizarro 0-rate environment world sweetheart deals with Adam Neumann), and their ridonculous valuation made them take on way too much debt to fund further expansion. Chapter 11 gets rid of all that. WeWork will be a much smaller company in the rather mundane business of office and property management, but it serves none of their stakeholder's interests to liquidate.