Destroyed? No. Denver has a lot of talent and they're grooming Osweiler who was their second round in 2012. So if he pans out then they should be fine.
Speaking of destroying teams, I see more and more mock drafts having Philadelphia trading up for Mariota. If they do that then it's going to cost them a lot in the way of draft picks, and would make Tebow redundant.
Osweiler ... wonder who will pick him up next year.