There's still a new JS framework everyday but if you ignore all that noise and for production-quality software just have a look at React and the most popular meta framework on it, Next.js, you'll be more than alright.
Don't be like me, choosing to build an entire app on Next.js and hating every moment of it after the honeymoon period ended 2 weeks in. Live and learn.
My Next honeymoon has been going on for a couple years now, and I think it's an AMAZING developer experience compared to anything I've worked with before (Perl/PHP/Laravel/Symfony/Angular/jQuery/React)... it's the framework that made me choose to specialize in frontend because it was so nice. What didn't work for you?
I don't blame you, heh. Every year I feel like the fragmentation is getting worse, not better. It's fun for a while, but makes it really hard to plan for long-term stability and maintainability. It's likely anything I write today will be unusable in 2 years.
However, I would strongly disagree with you on the part about it not being suitable for complex applications.
If you feel that way, you can choose to have a decoupled backend (which is what I do with Django) or go all in with full-stack integrations (tRPC in conjunction with edge functions) on top of Next.js.
I have seen great apps built with both of those ideologies.