The previous startup waves were built on top of expanded Internet access, mobile phones, and virtualization. This allowed low capitalized startups to create 10x better software. What you’re describing is marginally better software, you’re not going to beat Gmail by making it 10s faster. No one really cares about dark patterns and spam.
There will eventually be new waves that create opportunities for startups again, LLMs are like that in some cases, but I’d argue that mobile phones were by far a larger disruptive innovation than LLMs so far.