The worst real madrid i have faced pique laments barcelonas el clasico failure

I think there may be a slight mistake in your question. The quote you provided seems to be a mix of two different statements.

The quote "the worst Real Madrid I have faced" is likely a statement made by Gerard Piqué, a former Barcelona player, about a specific Real Madrid team he faced during his career.

However, the phrase "Pique laments Barcelona's El Clásico failure" is a separate statement that suggests Piqué is lamenting a failure of Barcelona in an El Clásico match against Real Madrid.

To clarify, could you please provide more context or information about the quote you're referring to? Which El Clásico match is Piqué lamenting, and what specifically is he lamenting?