The old school throw it in the freezer for months (after initial drying) has worked really well for me in the past as a curing method. I have also used the traditional dry and cure (with Boveda packs and CVaults) with good results. I did try “real” freeze drying on my work equipment (-80 C...
Happens to most people at least once. Environment is the key: if you are serious about this hobby, get dehumidification (below 55%) and AC (72-77 F ideally). Also, a fan running 24/7 and 20/4 light cycle helps as well (at least for the autos I grow). Better luck next time.