Is the death of a righteous and generous mother, who passed away in the bathroom due to a stroke caused by chronic diseases, considered a good ending or a bad ending?

A mother's death in the bathroom is not an indication of a bad ending, especially if she was known for her goodness and acts of obedience. Illness expiates sins. A bad ending does not befall one whose inner and outer states are righteous; rather, it befalls one whose intention is corrupt or doubtful, and it is more common for those who persist in grave sins.