I agree that there is nothing here to pursue. Technically, I would say you do not even have a claim. The elements of a malpractice case are: (1) deviating from the standard of care, (2) that caused injury, resulting in (3) legal damages. In this case, there does not appear to be any cause of additional damages. So, its not just a case of the damages being "too small" but that legally your case would probably be dismissed for having no causation of damages (delay did not compromise you, and there is no indication of additional suffering due to same).