Absolutely not! I suspect that it didn't get sufficient water as it was under your porch roof and wasn't getting any rain and it sounds as though you may have tended to water infrequently. It's easy to neglect plants over the winter as their water demands drop with the cooler temperatures and dormancy.
If you're in the east Tennessee, there are some resources available to you. In Knoxville there is the Knoxville Bonsai Society - Tom Bjorholm is a very nice man and a patient teacher. Also, Tree-Haven is about an hour or so north of Knoxville in Greenville. I saw a post indicating Warren Hill was ill recently, but I see that a full class schedule is indicated on his web site - including a beginners class in a couple of days.
I know it's hard to lose a tree, but, to be honest we've all lost some. Give it another try and consider tapping one of the places I mentioned for assistance. Good luck!
Scott