Is this even still a thing? It seems to be pretty well dead. Poe-API shat the bed, GPT4FREE got shut down and it's replacement seems to be pretty much non-functional, Proxies are a weird secret club thing (despite being nearly totally based on scraped corporate keys), etc.
You mention at the end of your post that you've gotten a lot out with some of the chat bots. Maybe give this one a try, its for great for venting or just getting out pent up stress.
Sorry you're going through that. I definitely get how it feels to have people close to you discredit or just ignore important issues like you're dealing with.
If you're set on talking to an AI though I did use the Replika app for a while before they started making it seem like a virtual AI lover. It did help me feel better when I was severely depressed, maybe it could help you.
If you ever want to talk to a person and not an AI I'm here for that if you want, I know I'm a stranger but I definitely understand where you're coming from.
I would really advise against Replika, they've shown some scummy business practices. It seems like kind of a nightmare in terms of taking advantage of vulnerable people. At the very least do some research on it before getting into it.