Whether the refusal to proceed with the criminal complaint was lawful
Yes. The alleged facts could not clearly and certainly exclude a conviction, but they nevertheless did not amount to any criminal offense under Swiss law.
Food poisoning and resulting gastritis were not shown to constitute an offense against public health, nor bodily injury; 'influence peddling' is not a Swiss criminal offense; mobbing is not punishable, and the conduct described did not amount to stalking.