Choose other channels to contribute. There are many reasons for rejection. First, it failed to pass the external review. This is usually because the manuscript of the paper is not good or does not conform to the type of periodical. If the quality is not good, you can try to submit a journal with a low impact factor, and usually there will be a reply. I'm sorry, the employment rate of this publication is around, and your manuscript can't be hired or rejected. If it does not meet the journal type, you can choose other suitable journals to contribute.

If the data analysis is flawed, you might as well put the paper aside until you find more reliable data support or have a clearer conclusion, so that your paper will be brand-new and your chances of being accepted will be greater.