Professor refuses letter of recommendation request The application for TA fellowship, one normally takes recommedations from previous professors one has TAed under.
What he replied when I messaged him asking for a letter of recommendation:


  If you remember I had major difficulties with the group of TAs of last
  year: the group behaved as if its internships were the most important
  jobs and only if it had time and in marginal hours, it would do its
  job. I rarely got an answer from my emails, I had to send the same
  email several times. The group rarely answered students' emails and
  their assignments' questions.   I asked for the group's support to
  proctor the exam, and at the beginning, nobody was willing to help.
  You were more collaborative than the rest. However, I still had to
  invest a significant amount of time to compensate for the complete
  lack of support of the TA group. So, in these conditions is very
  difficult for me to write the very positive letter that you need to
  win the scholarship. I am sorry that I cannot be more helpful at this
  time.


All of the things he says are not valid for me.

I didn't have internships, students sent me thank you after attending office hours and I went out of the way several times to accommodate his requests. Although, I can remember I replied him a few times the next day due to other work. He also did several things like threatening TAs for complaints which very out of the line at my University and unheard of.

Can I dispute his claims? I don't want a letter of recommendation anymore, I feel under-appreciated for the work I put in. I feel like I should reply to him, but I feel a bit angry for 


dealing with him with through the course for this
trying to go the extra mile for a future recommendation.


Background info:
The professor is not from my University and was hired to teach to a summer course.

Possible reply:
Attach a thank you email I received from one of students taking the course, and mention two times I went over the line to co-operate with him.
I am sorry for your situation, no one likes to feel under-appreciated. That being said, it is important to know which battles are worth picking. Your professor was very clear in his answer, and I can't see how can you (or anyone, for what's it worth) gain something pursuing this matter further. It would only create an unnecessary and tense atmosphere. You also said yourself that you do not want his LOR anymore. Let it go, and best of luck in the future.