In the Bible, it tells us that Jesus is the Son of God, but came down in the form of a human being to die for us and give us new life. The Bible tells us also that Jesus was treated like a human being; He was tempted for 40 days (Mark 1:12-13), He was scorn by the people and was also mistreated.
In Hebrews 4:14-16, it says this:
14Therefore, since we have a great high priest who has gone through the heavens, Jesus the Son of God, let us hold firmly to the faith we profess. 15For we do not have a high priest who is unable to sympathize with our weaknesses, but we have one who has been tempted in every way, just as we are—yet was without sin. 16Let us then approach the throne of grace with confidence, so that we may receive mercy and find grace to help us in our time of need.This passage gives us the reassurance that whatever we are going through, Jesus understands. Your question about bad marks may not be applicable for Jesus, but has He gone through stress? Yes. Has He experienced disappointments? Yes!
Jesus lived in a time that is very different than the times we live in. And although He may not have gone through exactly the same things that we are doing through, Hebrews tells us that He can sympathize with our emotions. He knows what it feels like to be betrayed, He knows what it feels like to fail, He knows what it feels like to lose a loved one.
[answered by Pastor KJT]