Dear [Name],
I am writing to apologize for the inadequate guidance I provided you. I understand that I have failed to meet your expectations and that I have let you down.
I take full responsibility for my actions and I am truly sorry for the lack of support I have provided. I understand that this has caused you to feel frustrated and overwhelmed. I am sorry for not being able to provide you with the guidance and assistance you needed.
I understand that I should have been more available to answer your questions and provide you with the support you needed. I should have been more proactive in helping you understand the material and providing you with the resources you needed to succeed.
I understand that I have let you down and I am deeply sorry for the inadequate guidance I provided. I am committed to making sure that this does not happen again. I will be more available to answer your questions and provide you with the support you need. I will also be more proactive in helping you understand the material and providing you with the resources you need to succeed.
I am sorry for the inadequate guidance I provided and I am committed to making sure that this does not happen again. I understand that I have let you down and I am deeply sorry. I will do my best to make sure that this does not happen again.
Sincerely,
[Your Name]