I like how each of the 3 LN protagonists' trauma represent something.
Six = SURVIVAL
Mono = LONELINESS
Low = LOSS
The Nowhere is truly a cruel and harsh world. No one safe, "Nowhere" is safe, as if it wants you to suffer more and more no matter the hope you feel inside. People say Little Nightmares 3 doesn't feel like the world hates you, but at the end of the game Low literally loses Alone, which is still cruel since that's how the Nowhere works. Low hoped to get home with Alone, but the Nowhere won't allow that and took her away from him. No matter what, the Nowhere will always find a way to make you suffer more trauma even if you have hopes to escape its world. Low may have escaped, but loses some part of him that the Nowhere took away from him, just like with Mono and Six when they lose their innocence or inner child; Low experienced the same thing.
This is not just a message for the people who think Little Nightmares 3 went "soft", it's also a reminder that no matter what the Nowhere is still cruel and harsh towards you, even at the end of your journey. I mean, the Residents in Little Nightmares 3 are still trying to kill you like the Monster Baby, The Supervisor, The Puppets, The Kin and Mini Kin, The Perfect Lady/The Puppeteer, and The Hypnotist; they all still want you to fail. Even if you've escaped The Nowhere, you'll always have the trauma and the scars from your journey inside The Nowhere.