Sorry for the loss and I hope Yuneec takes care of you. If I were to go amateur NTSB on this I would lean towards the battery not being fully seated. If the battery were securely in the bay I do not think it would have received so much damage considering the body of the H is mostly intact. The battery receiving so much damage and being bent near the middle may indicate it was not fully inside the body at impact. It may have ejected during impact but it does seem like a loss of power situation.
Hopefully the logs will tell the story and you get a new H. Oh BTW only a woman can properly shatter your heart, not a drone.
thanks for that analysis