Analysis
Jairam Ramesh did make the remark at the 2018 book launch, as reported by multiple news outlets. However, judging whether the UPA's 'biggest failure' was communication versus lack of achievements is an opinion, not a verifiable fact, and depends on one's political perspective and criteria for success.
Background
The United Progressive Alliance (UPA) governed India from 2004 to 2014, overseeing policies such as the National Rural Employment Guarantee Act and the Right to Information Act. Critics and supporters have debated its performance, but there is no consensus metric to rank 'biggest failure' objectively. Ramesh's comment reflects his personal view on the coalition's legacy.
Verdict summary
The claim is a subjective assessment and cannot be objectively verified.