Considerations for Rejoining a Previous Employer
Mr. Rajesh, do you really think they are going to hire you again? You mentioned that you resigned from your earlier job because you were offered higher compensation from another job, but now you want to go back to them because you are not satisfied with the work at your present job. It seems like you really need to be concerned about your career and focus on your career planning because the current strategy you have is not ideal, I would say.
Furthermore, if you were not satisfied with the work there or couldn't handle the work pressure, leading you to believe you were happier with your previous employer and now want to return to them, do you truly believe they will offer you the same salary you are currently receiving? I apologize, but I mention this because your query contains many questions.
In any case, if you had a positive experience with them and they are willing to rehire you, you can consider going back. However, I urge you to focus on your future and avoid adding multiple short experiences to your career history, as this may not be beneficial for your career.