This show has an extremely poor writing and, above all, she's extremely biased in favor of the main girl, even within the love triangle.
They're trying to shove the Jian bullshit down our throats, when 02 can always pilot a FranXX, whether with the 100 stamens that she used and killed by a selfish wish or alone in stampede mode, while Hiro can never pilot a FranXX, with a partner or alone, because he tried to save 02 as a child.
This show doesn't have any kind of sense of justice too.
Those characters who cares and try to help others always end up losing everything, while those characters who don't worry about anything but themselves and their selfish desires, do absolutely everything wrong, use, lie, deceive and explore other people or even kill innocent people end up always being rewarded in this show.
Hiro has always been a good boy who always helped others. He tried to save 02 as a child, after that day, Hiro’s aptitude score kept going down until he failed the test with Naomi, he even lost the will to live. While 02 is leading a life by deceiving, using, lying, exploring and killing innocent people while she is rewarded with privileges, pampering and even innocent people so she could use and kill them by a delusional selfish desire.
Eight years later, She returns again to deceive/use/explore him, as well as trying to make him the same kind of monster as her and almost choking him to death even though he treated her exactly the same way he has treated her as a child for half a year. And last but no least, 02 was rewarded with ten new stamens to pilot her ass, while Hiro was again sentenced to the same shit life he was in the first episode because he tried to save 02 as a child.