The religious leaders were disappointed in Him because He didn't play by their rules. He had the audacity to do it God's way instead of their way.
His family was disappointed in Him.
(Read Matthew 12:46-50 and John 7:3-5...."For not even His brothers were believing in Him.")
His hometown folks were disappointed in Him.
Even His disciples were disappointed in Him at times.
If Jesus disappointed people, we will too.
And when those people you disappoint are ones you love it isn't pleasant.
In the times I disappoint the ones I love I often want to say, "Can't we all just hold hands and sing Kum By Ya?"