BTRW has to show Earth and its allies losing. Just like the US lost for the first six months of the Pacific War until Midway. The reporter lets us see the civilian fear and reaction that the war creates.
The similarities between real-life WWII and the Earth-Romulan War aren't coincidental. Two enemies with huge cultural gaps, different visions, and a race war boiling underneath. Plus Starfleet gets most of its big ships blown up just like the US Navy had a good portion of its carriers sunk in action.