I don't think Shiina has any say or control over PC policies so I don't know why anything like that matters. Shiina's fond of Pippa, but it's not like they're best buds or anything. Their stream styles are extremely different and they barely collab. I guess I just don't understand what the concern or complaint you're trying convey is.
It's certainly the same angle of vague "She's a b-b-bitch trust me bros" but I think Spooki is too much of a pussy to come in here and start shit. However.... the pre-facing "I hate the fact that I needed an account to even" can and self reference "Also I'm so disappointed" is how Spooki posts, as if he's a character of great interest and not just an annoyance.
Yes, she has tongue tie, the frenulum is short and it causes a lot of the weirdness in how she speaks. The pitch however could be the abuse -> baby voice thing, or it could just be her character. Also the voice thing is usually tied to sexual abuse, not neglect (like being left in the car till she got heat stroke) or corporal punishments.
I also think she learned English young but was then isolated and unable to practice it for some time, I pick this up from her story about "going back to hell" and stuff. I took this as she lived in a city and then had to live some place rural for some time. I take most of her stories as allegory for actual things n her life.