Last week, 21 Chinese family members arrived in Malaysia to demand authorities to cancel a declaration, according to which 239 passengers and crew were presumed dead.
They also voiced complaints over the responses to questions they received concerning the accident.
At a news conference held at a Kuala Lumpur hotel, family members used a projector to show journalists photos of relatives of the passengers suffering emotional and physical trauma in China. One of the photos shows elderly man, who suffered a stroke after hearing of Malaysia's declaration about the passengers.
"We are extremely dissatisfied with the replies from Malaysia Airlines," said Jiang Hui, whose mother was on board.
"The answers were contradictory and not within the scope of the questions asked."
According to Xu Jinghong, whose mother was also on MH370, the Malaysia Airlines support center in Beijing was not helpful and said search operations might be cancelled.
"We think the plane can be found. I don't think they are searching at the right area," she said.
"I don't think it's in the sea."
According to the declaration, the MH370's disappearance was an "accident" and that the crew and passengers were presumed dead. This triggered protests from kins in Malaysia and China. Almost two-thirds of passengers were Chinese. The declaration allows relatives to move on and seek compensation, authorities say.
Family members also criticized Boeing as the US plane manufacturer didn't provide information on "product design and structure".
MH370 was carrying out a routine flight from Kuala Lumpur to Beijing when it disappeared on March 8.
The MH370 disaster is one of the greatest mysteries in aviation history.
Satellite data inexplicably indicates the plane went down in the remote southern Indian Ocean, Malaysia says. They suspect it is due to "deliberate" action on board.
Despite an intensive search in the area, no evidence was found. Malaysia authorities have still yet to release any findings from their investigations.
Kuala Lumpur and their airline are accused by the family members of a possible cover-up and bungled response to the disaster.