I spent a lot of time reviewing the manuscript you sent to Journal A. I don’t have a lot of free time, but I take my duty as an academic citizen seriously, and I read your manuscript carefully. I took special care to word my feedback in a way that was as constructive as possible. I know it can be tough to read comments about your paper’s quite serious shortcomings, so I made sure to also emphasize the good parts of the paper and to recommend a successful direction to take the next version. It’s hard to see that the other reviewers agreed that the paper wasn’t ready, and that it was rejected.
However, as tempting as it is to blow off the feedback from three reviewers and just send the same paper, with a slightly different title and a verbatim abstract, to another journal, please don’t. Chances are, at least one of the reviewers will be the same person as the last time, and even though we can pretend that I don’t know who you are right now (but you have heard of google, right?), it is just a matter of time before your work is presented at a conference or published in a journal, and your identity will be clear to that person, who works in your area, and whom you have just pissed off. And it’s a small, small world.
All the best,