Which cruiser concept was wrong for its role?

Can you name a cruiser class that was truly wrong for its intended role?

Few mainstream classes were wholly wrong for their role, but the aviation-cruiser concept itself is treated as fundamentally doubtful.

The response avoids naming a mainstream Royal Navy, US Navy, or Imperial Japanese Navy cruiser class as wholly wrong for its role. Most can be understood as rational compromises within their intended systems, even when particular choices remain open to criticism. The stronger objection is to the aviation-cruiser concept itself, which combines roles that may compete for deck, volume, and operational focus. This distinguishes an imperfect execution from a questionable underlying concept.