My main gripe with 11-nin iru (They Were Eleven) is that I actually really loved how Frol was central to the conflict. I love how their resolve to be a man is strong enough for them to want to die for it. To die here with honour and resolve even though unfulfilled. When all 10 of the crew members unanimously vote to save Frol's life even though it risks their chances of becoming a man, it feels horrible but it is the only right choice. It's an incredible scene because even though at first it feels like none of them support Frol's right to choose, it's more like the choice of Frol's life above all else was the easiest choice to make. Each one of them would've given up something when forfeiting the test but none of them hesitated.
All of that is undermined by, of all things, a marriage proposal by an earthman. Suddenly, their resolve (that they were willing to stake their life on) was just a whimsy and becoming a woman is what would make Tada love them... for what exactly? Frol doesn't even like Tada! No where in the movie did it show them having feelings for him. Maybe Tada had feelings for Frol, but hardly the other way around. And what's worse is that, in the sequel, when the two of them get engaged, Tada is fine(ish) with Frol experimenting with their gender. So that whole last scene never needed to happen because All Of Them Passed The Test Anyway so Frol Could've Become A Man or Anything They Would've Wanted. Frol's entire character is ruined by the shallow-ness of simply wanting to be a woman to please a man. Like, the whole movie gives a masterclass build-up for the best trans rep you've ever seen and completely destroys it.