I was in the counseling chain for mids wanting to leave voluntarily, when I was on USNA staff.
When a mid sat in front of me and told me they liked their friends, liked the Navy, liked their profs, but had realized military life was not for them, and they had already started school applications, were being thoughtful about their timing so they could have transferable credits, had made plans for a part-time job while awaiting a new semester to start elsewhere, and had had grown-up talks with family about their plan and how they would contribute at home, I knew they had left USNA behind in their heart and head, and were focused on their next goal. I particularly remember one mid, who was doing very well, the daughter of restaurant professionals, who realized she was baking and cooking complicated dishes at her sponsor’s home every weekend, and that she really wanted a career in “the family business.” She had already explored scholarships and financial aid at Cornell - she had a solid plan, with one foot out the door. Others, not so much. It is truly a shock for many to find themselves at the bottom of the class, and they can’t seem to find their footing to fight and grit their way out of it, so they think about leaving this tough new world behind, no matter that in their essays and interviews they talked about taking the harder road, wanting to be pushed to the limit, or being held to higher standards.
The OP has gotten excellent advice from a good cross-section of posters.
@Midmom2023
If you are connected with a USNA Parents Club, the parents of upperclass could doubtless tell you of many occasions when their mid was ready to bail.