Frozen coil in the fridge
Mechanically removing ice is a great way to break your fridge. Stick to heat and time.

Your fan appears to not be attached. That would be  problem.

Other than that, you either have a problem with the automatic defrost, or it was overwhelmed, perhaps by the lack of a happy fan causing more icing than it expected, or by excessive humidity. I have had a fridge that would need an occasional manual defrost in the summer, but which was fine the rest of the year. Eventually it got worse and was replaced.

Being careful to seal and cover things in the fridge to reduce evaporation, and minimizing the time that the door is open will both help, somewhat, by reducing the available water in the air to freeze.

If you have bent fins while mechanically removing ice, carefully straighten them - bent fins block airflow.