Amanda Overton is such a shit and incompetent writer I genuinely become angry whenever I am, unfortunately, reminded of her writing. I could go for hours upon hours about it, but it simply would not be worth all the time and energy. Maybe for analytical, educational purposes, it would, but I'm not a teacher.
Simply put, though: her admitting that she had to create an entirely new (and nonsensical) ship out of thin air just to make Caitvi look good indicates that she has no confidence in her main ship. She says having a lesser ship is necessary for a romance but it really, genuinely is not. That's something you only get in your head if you feed yourself nothing but cheaply made, mass-produced, love triangle bullshit, with flat characters and overall meaningless stories. When you write a relationship, it should be able to stand on its own. Caitvi can't, and it's hilarious that it can't with or without "lesser ships" to compare it to. It's just that bad, inherently, and everything else around it just makes it more egregious.
Overton is wholly incompetent. She's worse than a fifth grader writing for the first time with self-insert fic on Wattpad. It's annoying when she pats herself on the back for writing a flashy corporate 8 hour+ ad Now With Lesbians Having Sex Onscreen, and it's especially annoying when the majority of Arcane fans laud her for Caitvi and hold it up as absolutely revolutionary representation, when it's largely anything but.
Overton, and by extension, Caitvi, reinforces an oppressive status quo, just with lesbian paint on top of it, and it's not even out of ignorance. Amanda Overton genuinely believes that it's silly to have a distrust or distaste for the police - which she herself writes to be systemically brutal, prejudiced, and merciless. "Vi had to get over her 'all cops are bad' thing", she said. And the loudest, most annoying parts of the Arcane and Caitvi fanbase are just... fine with that. Because they agree.
Don't take this as me advocating for Meljay, by the way, in my opinion there is little to nothing good about that ship, in any respect, in part because the nature of its creation poisoned its chances before it could even start. That's a different discussion, though, and thinking about my endless gripes with this show exhausts me.