Richard Bandler hasn't demonstrated even a single verifiable, undisputable result with his methods, and he's been fabricating things like this for decades?

I think homeopaths and faith-healers could probably dredge up a few convincing-seeming anecdotes as well.

If there are no claims to any of the above, what exactly was discredited?

The wikipedia article you linked to presents numerous meta-analyses in support of the claim that NLP is a pseudoscience. If you want to know what they think they've discredited, read them.