This may be because the expression of the article is not clear enough, the terminology is not used properly, and the language is too complicated, which makes the reviewers unable to understand what the author wants to express. This requires rewriting some obscure or complicated paragraphs in the language to make the paper easy to understand.

2) The evaluator did not find the novelty/importance of the research.

If you find that the comments received are only a few words, not too many, it is also possible that the current research has not aroused the interest of commentators. If your research findings meet the level of the target journal, then you need to explain why your research is important in the article, and try not to let readers summarize your research value by themselves.

3) The submitted journals don't match the research content.

If the submitted journal does not match the research content, the editor may invite inappropriate reviewers, resulting in unprofessional review opinions.

4) The reviewer is biased.

This situation is relatively rare. Reviewers may be biased because their research is different from your research philosophy or highly consistent with your research, and they don't want similar research to be published before themselves, giving negative feedback.