Freezer milk

My milk that I store in the freezer has a freezer burnt smell when thawed out and my baby won’t drink it well at all. She will fuss the entire time for my husband when I’m at work. She is just fine with freshly expressed milk but i usually try to rotate it and use up the frozen before it goes bad. I don’t think the milk is bad because it’s only been in freezer for a couple months at most. Anyone have any tips to keep it fresh?