Positive meaning
A bad atmosphere in a dream may symbolize a process of inner growth. It might be a signal that you are trying to overcome a difficult period, which strengthens you and prepares you for better times.
Negative meaning
A bad atmosphere in a dream often reflects the inner unrest and stress that the dreamer feels in real life. It may indicate that you are worried about the situations surrounding you, and feel powerless to influence them.
Neutral meaning
A bad atmosphere in a dream may simply be a reflection of your current emotional state without a clearly defined meaning. It could be a way that your mind processes daily stimuli and concerns that accumulate within you.