The evidence for GR was Mercury's orbit which Einstein showed was consistent with GR, unlike Newtonian dynamics; that's still the most potent evidence. The experiment with the eclipse was only 4 years later. How was what Einstein published wrong? He added the cosmological constant afterwards and of course later removed that, but I don't know of the main theory being wrong...

Like I say, neither theory is any more debunked than the other, really. There's currently nothing to replace GR, but that doesn't make it any more or less 'debunked' that classical gravitation; we already have the evidence that it is incomplete.