Probably fearing reprisal from the government. Zelensky’s government has a tight grip on the news and media, they are from the media industry themselves, they know how important and powerful it can be. They banned all TV channels except their own, Telemaraton or something like that. They put restrictions on what newspapers can publish and limit access to areas, like the front line.

You are most probably correct, but the word "integrity" still feels not very accurate even in this case.

The “internal struggle” is the people of Ukraine fighting against their government that has decided to sacrifice them for US/NATO interests.

I hope very much. Note that unlike rest of former socialist countries, Ukraine had to be couped every decade at least once to keep them on leash: 1991, 2004, 2014, 2022