I keep a few ideas in mind to keep things in perspective and to avoid unnecessary angst:
1. Students earn grades; professors do not "give" grades.
2. Students have what they need to do as well as they can from the first day because the syllabus and assignment instructions were complete and thorough.
3. Not all students can do as well as they think they can, at least, perhaps, not at this point in their lives.
4. I cannot control what administrators may do, but I am a conscientious grader. A pravda vítězí (And truth prevails).