It may be an appropriate preparation method for certain food when followed by the required cooking, but it is not a way to preserve an entire failed-freezer load indefinitely.
What the observation tells you
Microwave defrosting can create uneven temperatures and must follow the food and appliance instructions. Portions intended for later use need a different plan. Food already unsafe from its earlier history is not restored by a defrost programme.
A useful next step
Decide what can be prepared safely now and arrange suitable storage for the rest. Follow all standing, turning and cooking instructions. Do not refreeze partially warmed food without applicable food-safety guidance.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.