If you are unable to do any specifies as a reviewer for the manuscript, you have to choose between a major revision submitting one specific point, accepting the manuscript, or not accepting to review the manuscript. But building up your opinion on background or rumor or whatever type of thoughts that you are building your opinion on is not appropriate and this is not the target of the review. The target is to modify the manuscript to look better and not be rejected and show off your English language using the thesaurus of Microsoft Word. The review does not provide a single specific point. See below
"The manuscript exhibits notable deficiencies, and the overall caliber, encompassing the value of the scholarly contribution, the robustness of the methodology, the clarity of presentation, the depth of discussion, and the formulation of conclusive statements, does not meet the standard requisites for publication in a scholarly journal."