Yes, it became outdated after several years in use (6 on the iPhone?) and perhaps even didn't age well looking back on it. But for the time it was used it was definitely not a failure. Design preferences change, it doesn't mean everything that is replaced is automatically deemed a failure.

And unlike many other design trends that are purely about aesthetics, skeuomorphism also had a practical aspect: people had to "learn" a whole new way of interaction with these devices and using familiar shapes and textures helped. The "Start" button in Windows is called like that because people literally needed to be told where to start with the "futuristic" GUI.

So?

Those examples are not the really bad aspects of skeuomorphic -- which is about not taking advantage of the unique digital opportunities for UI controls, and instead e.g. copying a DVD hardware interface or some other physical mechanism verbatim.

At worst, they're tacky. You can do equally tacky things in non skeuomorphic UIs.

But even that is just taste. All kinds of imitation materials are still used all around UIs and design, and still considered beautiful (e.g. frosted glass -- there's actually no glass. UI lights with diffusion, there's no real material to diffuse their light. Etc.).