As someone with experience as an instructor and in both seats of an airliner I feel that I can comment on the phenomenon you describe:
Your instructor - quite simply - lacks the confidence in his own abilities to be a good instructor. He was 'frightened' not because you attempt at landing was particularly bad but because it came very close to what he understood to be the edges of his personal envelope.
Sadly, if he is incapable of dealing with what seems like a very mild error then he lacks the skills to teach.
You must make mistakes in order to learn; he must allow those mistakes to develop to a point where some teaching value is obvious; he must be able to recover the situation in a way which allows you to move forwards in your learing process.
This lack of confidence is prevalent throughout 'professional aviation' - bear this in mind and find yourself a good instructor (someone committed to EDUCATING you).
Please continue enjoying flying - good luck!