We should keep in mind that there are issues of jurisdiction that apply to many of the possible actions being considered. Evans's criminal complaint will almost certainly be dismissed because the law doesn't apply to the seven, since they did not do anything (much less anything illegal) on Croatian soil, and the crime of insult is not a crime in most/all of the countries they actually live in.
Unlike, say... paying prostitutes for sex every couple of months for three or four years.
The letter threatening legal action unless a hefty sum was paid could be considered an extortion attempt. Interesting how the only actionable crimes have been committed by Evans.
As for what he is accusing Kim --or any of the seven-- of doing, no one knows for sure. He refuses to state what it is they did. For all we know, he has not provided the necessary details to the court, which would require an actual crime to have been committed in order to decide if they will prosecute anyone. There is reason to think that he is hoping people forget about the whole case.