Dry food

Probably not using the power/percentage button like you should. It's an underrated and under used button on a microwave.
Try thawing your food at 30-80% power for 60-90 seconds, then finish reheating at 70-90% power for about 60 seconds, then about 30-45 depending on how hot you want it. Also, for the bready food or fritters, add a dampened towel to cover your food so that the microwave doesn't super dry out your food.
It will take a little bit of trial and error, but that should help as a starting point!

Just add a small splash of water to tbe container when reheating