Re: so discouraged...
What kind of storage container are you using? I have mentioned on here before that anything I stored in Medela or Ameda bags smelled bad when I thawed it, but anything I had in a Lansinoh bag was okay. I think double-zipper bags are the way to go, but I didn't know that until some of my milk smelled awful. I know other people here have mentioned Honeywell bags as being good, as well. That doesn't help with your already frozen milk
but you may want to make sure it's not the bags before you start scalding. If it is lipase, I guess you're stuck, though.
Mom to my sweet little "Pooper," born 10/12/11, and "Baby Brother," born 6/23/2014, and married to heavy metal husband. Working more than full-time, making healthy vegetarian meals for family, and trying to keep up with exercise routine.