On day of judgement if you have backbitten someone your good deeds will given to that person or if you don't have good deeds you will take his evil deeds. We all know everyone backbite, it's difficult to be free from it or any other sins. Also there is no guarantee if you have a lot of good deeds you will enter Jannah so is there any point of doing good deeds? I am not telling anyone to stop doing good deeds, just asking a question to increase my knowledge.