All I'm learning out of this thread is that a lot of Era really does just see people as "burritos and tacos", rather than people, judging from the "I learned something from that clip :)" posts. Which is not surprising but a bit disappointing.
More generously, though, that y'all don't see the issue with it is why people are saying it's problematic. It's prescribing a definition upon bisexual and pansexual people that many bisexual people and basically all pansexual people (who aren't just holier than thou pricks in disguise) disagree upon, as well as reinforcing transphobic ideals.
I'll give a stab at explaining things myself, so other bi and pan people don't have to. But can, of course.
Bisexuality is attraction to two or more genders, or alternatively, bisexuality is attraction to those who share your gender and those who don't. Bisexual people can have preferences in partners based on gender. For instance, there may be women who identify as bisexual, but really only express attraction to fictional male characters while only really being attracted in reality to women and/or nonbinary people. Alternatively, as I've often seen myself - and why I feel the bisexual label doesn't apply to me- there are a number of bi people who like their men manly and their women feminine. Particularly feminine twinks and butch women are unattractive to them. This of course doesn't apply to all bi people, but it helps explain how their preferences directly relate to their potential partners' gender.
On the flipside, pansexuality is similar if not the same from a cisheteronormative perspective. But there is a real difference. Whereas bi people can profess gendered preferences (though, of course, they don't need to), pansexual people by definition simply don't see gender as a deciding factor in who to be attracted to. They're attracted to other aspects. In my case, I admit I prefer people who present as feminine or androgynous. But that doesn't mean I prefer women, because, I don't. I just like anyone who I consider "pretty", really, whether they're a man, woman, or nonbinary. And at times I do find myself attracted to masculine presenting people as well. Other pansexual people look to personality traits instead of visual cues. But gender identity (and especially not genitals) really isn't a consideration in who we're drawn to.
Besides that though, neither bi people nor pan people need be specifically attracted to a specific set of genitals, which is what the clip prescribes as sexuality. Hell, neither do straight people. So the "taco/burrito" metaphor falls horribly flat and helps misinform how sexuality does (and ought to) work.
*
(outside of MAYBE cases where such genitals can trigger someone with psychological problems arisen from sexual abuse, but those problems can arise in trans people as well)
the victim complex of some people that identify as bi is honestly fucking wild
The victim complex of anyone of any group is fucking wild. There are outliers of any group who think every and anything is an attack on them. But they are just that, outliers. Most complaints about marginalized representation and fight for rights are far from just "victim complexes" taking spoken or written form, and it's diminishing to suggest that.
Regardless, I'm not seeing this going on here. Those of us who take issue are just pointing out "hey, this is inaccurate, and could potentially harm perception of how bi people are seen, thus leading them to being harmed or to them questioning their own inherent morality for being bi". No one is saying the show is inherently evil or bad or is #cancelled or anything. Just saying "hey, the writers should work on their goddamn metaphors". Some are being a bit more less calmly spoken than others, to put it nicely, but the key message is basically the same, I think.