Long time lurker, first time poster here!!
I just want to jump right in, the reason I believe Chantal is not really "embarrassed" by all her weight loss failures, over and over, is because she has not come to terms with her biggest failure and embarrassment in life yet, which is not being able to lock down a man in marriage by age 35 and having his kids if he so wishes.
The weight problems are obvious to herself and anybody, of course, but at least it is all within her "power" and control to blatantly "work on that" and she can have the feeling of doing something about her issues by focusing on her weight.
The relationship issues, which I think are more severe to her mental health than she admits or even realizes at this point, can therefore be ignored in her mind because she is working on the physical symptom of her damaged psyche by focusing on her body and ultimately food.
If she admitted the dead end of her relationship she put herself into and her ultimate failure of never having that husband and a normal family that would be too painful to deal with. It is less painful to focus on ghostly diets, failure to eat those unripened fruit, focusing on carcinogenic pepperettes, telling embarrassing fart stories and unreal "lover" experiences, having her ungodly body exposed to the world and bashing those damn haters out there that are "coming for her".
And Lezbereal, the relationship with Bibi is nothing. Even if his sister is really his sister and he goes by "single" now, the guy is Muslim (she mentions this in one of her earlier Q&As) and naturally his family expects are large family with kids, which is probably where those "he wants five kids" in one of her crying vlogs came from. She will never be able to provide those, and to add more mismatches in this relationship, she is Atheist, not interested in the Muslim faith which she would need to convert to to marry Bibi, and also on Bibi's part, where is his interest for Chantal??
If my significant other is eating herself to death, crying about her food addiction, and my response is that I didn't even know such a thing as food addiction existed, after living with a 370lb woman for six years, I am not convinced there is anything but shared rent involved in this.
And one last point: If my loving girlfriend was dependant on her YouTube income and needed to film to get those shekels, well, I could be more supportive and get over the back of my head being in some videos. I see zero support in anything, and you have probably all noticed Chantal never mentions anything Bibi practically supports her with. Taking her to the doctor, joining in on walks or the gym, cooking together, going to the library/museum, going swimming etc. The closest we got to him being that "rock" was "meh, I'll take you to that ER if you reeeeally need me to."
To long did not read: Chantal needs to get her relationships in order. Especially the toxic Malan/Bibi one (how about starting to use his real name and starting to dissolve the fantasy relationship that way?), Before mental health and weight loss or any real and lasting change can happen in her life imho.