I can't think of any reason why NASA would propagate negative information about the universe. It does not help them to advance their agenda. They want people to know what is out there. The scientific community wants to only promote facts, not false narratives that are manipulative in nature. They are good.
I do not believe NASA would report false information about the nature of the universe. I believe scientists and technicians employed by NASA would not even consider releasing false information. What reason could there possibly be for not telling the truth? These people have families just like the rest of us. It would serve no purpose to give out information that was not true and factual.
Despite popular belief and conspiracy theorists, NASA does not issue false information about its findings surrounding space and the universe. NASA's information is completely accurate and reliable because that is the space agencies purpose today. It provides information on space and similar findings to the American people each and every day.
As a general rule, I do not believe NASA issues false information about the nature of the Universe. I believe if they have released any falso information it would have to do with the existence of other intelligent life in the Universe. Beyond that, I would say they are generally honest to the public.
I believe that NASA tells the truth when it comes to what is in the universe, what they have found, and what they are doing. They tell the public all of the missions they are running, and provide videos and images so that we can visually see their actions in space.