Step 1: Identifying the underlying problem.
This person seems to be experiencing a lack of motivation, leading to decreased performance and tardiness. The feeling of disgust towards work may indicate burnout or a lack of engagement with the tasks at hand.
Step 2: Suggested response.
I would recommend that this person reflect on what aspects of their job have caused the loss of interest. It could be beneficial to discuss their feelings with their manager to explore if there are any changes that can be made to their role. Taking time to reassess career goals and seeking new challenges could reignite motivation. In some cases, counseling or therapy may help address underlying emotional concerns.