It's a beautiful quilt, ESPECIALLY for a first try. Maybe your Dad didn't understand the work that went into it. Or maybe he's just a clod. I made a quilt top for my brother for Christmas, Grandma hand quilted it, and neither of us has yet to receive a thank you.
But, just because some people just don't get it is no reason for you to quit quilting. You do beautiful work, and believe me, others will appreciate it. Keep your chin up!