Yes, a PhD in Law can be difficult, but it ultimately depends on the individual student and their capabilities, motivation, and work ethic. 

A PhD in Law is a rigorous and demanding program that requires a high level of dedication, perseverance, and critical thinking skills. It typically involves several years of intensive study and research, culminating in a dissertation that contributes original knowledge to the field of law. 

Here are some of the challenges that students pursuing a PhD in Law may encounter: 

1. Rigorous coursework: PhD students in Law typically complete a set of advanced courses in legal theory, research methodology, and their area of specialization. These courses can be challenging and require a high level of analytical and critical thinking skills. 
2. Research and writing: A significant part of a PhD in Law involves conducting original research and writing a dissertation that contributes to the field of law. This can be a lengthy and challenging process that requires a high level of intellectual rigor, creativity, and attention to detail. 
3. Time management: PhD students in Law often have to balance their research work with other commitments such as teaching, coursework, and personal obligations. Time management skills are essential to ensure that students are able to stay on track with their research and meet deadlines. 
4. Competition: PhD programs in Law are highly competitive, with a limited number of spots available for each cohort. Students will need to be able to demonstrate their academic abilities and potential for original research to be considered for admission.