There isn't very good evidence DID really exists. There are psychologists who believe it does and specialize in it, and there are psychologists who don't.

No, evidence indicates otherwise. DID exists. The first article you linked did not even claim that DID does not exist, it was talking about the Satanic ritual abuse movement and how Multiple Personality Disorder was overdiagnosed-- which indeed it was. Both the articles you linked are talking about the fad of DID-- the social contagion phenomenon, similar to that of the transgender one we're seeing now.

Evidence supporting the existence of DID:

• DID patients can be reliably and validly diagnosed with structured and semistructured interviews, including the Structured Clinical Interview for Dissociative Disorders–Revised (SCID-D-R)54 and Dissociative Disorders Interview Schedule (DDIS)55,56 (reviewed in Dorahy et al. [2014]).14 DID can also be diagnosed in clinical settings, where structured interviews may not be available or practical to use.57

• DID patients are consistently identified in outpatient, inpatient, and community samples around the world. 12,37–45

• DID patients can be differentiated from other psychiatric patients, healthy controls, and DID simulators in neurophysiological and psychological research.58–63

• DID patients usually benefit from psychotherapy that addresses trauma and dissociation in accordance with expert consensus guidelines.64–66

source: https://journals.lww.com/hrpjournal/fulltext/2016/07000/separating_fact_from_fiction__an_empirical.2.aspx

DID is a rare disorder that arises only in individuals who have undergone severe and repeated trauma in early childhood. This is yet another parallel between DID and transgenderism: Pretenders may come and go, but just because pretenders may latch on to an easily-abused concept, does not necessarily mean that the concept itself is false. This is the same with transgenderism, too: Saying that DID isn't real because there was a fad where people faked having DID, is parallel to saying transsexualism isn't real because a bunch of people are faking being trans. (Of course, some people do think transsexualism is fake, but that's another discussion.)

Now-- whether or not the DID diagnosis would actually be better described as a subtype of another disorder, such as schizophrenia or BPD, has been up for debate in the field for a while. This paper compares DID patients to BPD patients, for example, and they have a lot of overlap, although a few interesting differences as well. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4579511/

I know it might seem like splitting hairs to debate this but this does actually exist and affects a tiny segment of the population. Like I said, there's been a handful of research articles that have surveyed the general population for DID, and found 0.5% on average or so. (Edit: I have links to these research papers as well, if you're curious, they're somewhere in my email.)

Some of the same doctors like Diane Ehrensaft who never suffered any consequences for pushing Satan Panic are now transing toddlers.

That is just. So beyond fucked up. Wow.

edit: spelling, added a couple words to clarify

edit2: Also, the second article did not provide evidence suggesting that DID does not exist, and is missing some factual information-- for example, MPD was reframed and altered but still continued as DID, and the article confusingly suggests that it "disappeared, to one day rise again". It did not disappear, but it started getting diagnosed WAY less.