Weather changes can have disastrous results. Winds and rain can cause irreparable damage by bringing things into contact with the developing body or wings. The insects can become dislodged, falling into the water where they can drown or be eaten. Where suitable emergence sites are limited, larvae can walk over one another disrupting development. During emergence, the insect can't fly away, and hence is vulnerable to numerous predators.
Emergence requires a lot of energy and some insects die trying.
The abdomen is also malformed, having a segment which twists to the left. The damselflies I am familiar with tend to emerge in the morning and fly in the early afternoon. Recently emerged insects are often snapped up by hungry or nesting birds. Most of the pond or quiet water species I am familiar with usually emerge on vegetation in or near the water. If you are lucky, you might see a nymph climbing out of the water.