LLB and LLM is very difficult and not everyone can pass it in one attempt, but it is okay. It is not that easy as it seems. I know because I was one of them and there were some courses which were pain for me. For that courses I used to hire professional law essay writers who were always there when I needed help.
You are right. Most of the students struggle when it comes to writing their essays or dissertations as law dissertations and essays need a lot of attention to the details and research to cite and give reference about a particular article or law. In such scenerios, students go for law essay writing service online so that they are able to relax and get done with their other academics, which is fair.