I see no evidence in the page history that Bethany Mandel has ever signed in to edit her own page. That's just lazy and dumb. Hey Bethany -- you can fix it.
So stop whining about the bias (the bias is real, no argument), and DO SOMETHING about it. Edit your own page, remove anything that's demonstrably false, add things that are true (with citations of course) and paint a more realistic/fair picture of yourself.
The liberals/leftists/woke/etc. people who are active on Wikipedia are going to be there. If you want to counter their falsehoods and unfair descriptions, you have to get off your ass and do it.
Editing one’s own Wiki page is tricky; and there will always be someone ready to step in and edit it again.
There are even rather militant ‘teams’ involved in editing various pages to suit a particular agenda:
It's not so simple. The activist trolls will "dispute" the updates and it will revert to its former state.
“Hey Bethany Mandel. Anybody can create, edit, comment on, etc. a Wikipedia page. Certainly a page about a person can be edited by that person.”
I agree that she could take constructive steps, but it’s not quite that simple. Wikipedia does have conflict-of-interest rules. You aren’t allowed to edit your own biographical article. (Of course, people have been caught doing so, and I assume some have gotten away with it.)
What Mandel could do is to edit the talk page associated with her article. She could sign a post to the talk page in which she noted specific problems with her article (things that should be changed, removed, or added). Then editors could consider her objections.
For example, she complains that her article is a collection of her “worst moments”. If something unflattering about her is false, she could say that. If the article is biased because it presents only one side, she could suggest favorable information that should be added. (FWIW, some accolades that she’s received are in the article — not buried, but in the second sentence. She could point out any others that have been omitted.)
If she put in the work to do this, what would Wikipedia’s editors make of it? It would be interesting to see how they responded. My guess is that she’s already moved on, though.