They are now demanding that the UN take over and launch an international inquiry into the disaster.
Reuters obtained a copy of a letter written by Van der Goen Attorneys on behalf of 20 relatives from Belgium, Germany, the Netherlands and the US, which was sent Dutch Prime Minister Mark Rutte on Friday, accusing Dutch officials of having failed to build a case.
It said the Netherlands "has completely botched" the fact-finding investigation and the legal framework of the case.
Dutch prosecutors have been unable to access the crash site, which is located on the front lines of a war zone in eastern Ukraine which is disputed by Ukrainian troops and Russian-backed rebels, and haven’t met international requirements to secure evidence, the letter said.
"Nobody knows who is doing what," Reuters quotes said Bob van der Goen, a spokesman for the law firm, as saying. "There is no coordination, there is no leadership whatsoever [by] Holland."
Rutte said on Friday that the Dutch teams were returning to the Netherlands.
"We have done everything we could. In view of the safety situation and the weather, we cannot do anything more right now," Reuters quotes him as saying.
On July 17, Malaysia Airlines Flight MH17 crashed in eastern Ukraine while en route from Amsterdam to Kuala Lumpur, killing all 298 people onboard, including 38 Australians. Kiev authorities have accused independence fighters from the self-proclaimed Donetsk People's Republic (DPR) and Luhansk People's Republic (LPR) of shooting the plane down. The authorities said that they do not have weapons which are capable of shooting down an aircraft flying at the usual altitude of a Boeing 777.
A preliminary report released by the Dutch Safety Board stated that Malaysia Airlines Flight MH17 was hit by numerous external objects, but there was no evidence of technical shortcomings or crew error and an additional investigation was required to better understand the causes of the crash and find those responsible for the tragedy.
