Anger, like every emotion, is neutral, neither good nor bad. What makes it good or bad is what we do with the emotion. We can sometimes take our frustration with one person out on a different person but when Jesus vented his anger, he never directed it at the wrong person, always at the appropriate person. Jesus never did anything violent against any person. Anger is good when it arises from a suitable cause, when it is properly directed and correctly expressed.
Anger has to be expressed in some way and let go, otherwise it eats into the person.
That was a healthy way to live. Like all of us, Jesus was afraid when faced with something dreadful. We all know about Jesus agony in Gethsemane when he asked his Father to let the chalice of his passion pass him by. He prayed and then he was uplifted once again so that in the following verse Jesus said, Father, glorify your name. If our prayer is working, if we are praying properly, it should also uplift us as it uplifted Jesus.