I've watched Star Trek since i was child, but it was J/C what made me addicted to it. This essay you wrote is very truthful and I have to agree with every point. There were three characters on Voyager I used to like. Janeway, Chakotay and Seven. But i think that they destroyed all of the them over the years, especially after Jeri Taylor left the show.
Endgame is just a slap in the face not only for J/Cers, but i think that to almost every Voyager fan. My sister is not a J/Cer, yes she was very disappointed by it - "I've waited seven seasons for THIS?"
it seems like the TPTB didn't care about Voyager end at all.

SevenJetC