The reason for Iga's poor performance was the lack of technique / skills in playing without topspin on the grass; this should be trained and assimilated, among others, in pre-Wimbledon tournaments.
She had neither the time nor the energie for this after such an excellent but exhausting season. So the question is: why did she go to this tournament?
Iga's power is based on fast-played, incredibly intense topspin, so all opponents often have big problems with positioning for the optimal pickup of the ball. Her second serve without topspin is unfortunately, useless.