28. The Killiam-Romance, that was supposed to finally move forward in Season 6 (Supergirl)
When asked about Season 6 between the Covid-Shutdown and the start of filming the Final Season the one thing we were told would happen in Season 6 was, that the „slow burning romance between Kara and William would continue“. And of course nothting of that sort happened. As soon as Kara was back on Earth, we learned William had started dating someone else, and the topic was never brought up again.
Now, I know that there were many fans, that were against that romance, but that was not even the reason the writers dropped that storyline, they dropped it because it was the last season and Supergirl is supposed to be single because having a partner, especially a male one, is anti-feminist. Only singles rule (which is why they split up Harley and Ivy in the Comicy by the way). So no the frozen burn romance just totally stopped.
If that would not have been the case William’s Death would have least been really tragic, but maybe that was the the main reason they gave up on the romance alltogether, because they felt that they couldn’t have killed of William, if he and Kara would have gotten serious at some point. Well, if that is the case, one more reason to actually have the romance: Because then William would not have died.
In any case, they just forgot about that romance, so they could spend even less time with Kara once she was back than they did when she was trapped in the Phantom Zone. By giving her a love life she would have had at least some character development beyond PTSD and totally giving up on Kara Danvers in the final season. But since they wanted her to only be Supergirl as much as possible in the Final Season, they were probably glad to have one less reason for her to put on the Kara Danvers-Persona so to speak.
In six seasons Kara had three major romances, that all lead nowhere, in all three cases because the writers lost interest. Compare that to what was going on in all the other Arrowverse Shows - even „Batwoman“ finally managed to get a long time romance in with Season 3, but „Supergirl“ was just an example for the fact that women, who date men, are seen as weak and are not hero-material in the eyes of the world, while men get to date women and be heroes all the time. So much for feminism.
And they did not even have them date for a little bit and then split up, no, this was even worse than the Karolsen-Shit they pulled back at the beginning of Season 2. They spent an entire season building something up, only to have it not happen at all. Back to Built Up with no Pay-Off again. That is the general writing of „Supergirl“ for you in a nutshell.