> Gen Z is looking like the most garbage generation of the last two centuries with more mental illness than any generation in history.

I'm not at all Gen Z (late Gen X), but you can't put all of that on them. They've had many formative years during a lot of the points you've listed.

> Can someone tell me everything is going to get better?

That's never guaranteed. You can only control what you take in, how you cognitively frame it, and how you react to it.