Is it bad that I'm not reading anything from that list of nominations other than Ruri Dragon, Itokonoko, Aitsu no Kanojo and Damedol? And to be honest, nothing really catches my eye that much.
How else should I take it if not <since it's ending it shouldn't be there>?
You should take it as a neutral sentence. One can express their feelings without taking a side. I like pancakes ≠ I hate waffles. I'm sad this series has only 3 chapters left and it's nominated ≠ I think it shouldn't be there.
Technically you did put words in their mouth and used a completely incorrect analogy. The movie being over doesn't matter because one, as long as it's showing in theaters it's not "over" so winning an award can definitely boost its popularity. Two, Oscars isn't a "popularity boosting" award, it's supposed to be a prestigious accolade selected by a set of jury. An Oscar equivalent would be something like Japan Media Arts Festival awards or Osamu Tezuka Cultural Awards. Next Manga, Manga We Want to See Animated, are all for popularity boosting and the other guy is in the right.