A new search engine now has to compete with global network effects, orders of magnitudes more data, Android, and a complex web of interconnected functionality.
Are you a pessimist in life? You’re focusing on only the negative aspects of starting a search engine today.
24 years after Google was formed we have orders of magnitude cheaper processing, orders of magnitude better AI, the ability to start small with cloud computing and work your way up from there. We have 24 years of search engine research to a large extent publicly available.
I really think all this “things would’ve been so much easier back then” are simply excuses as to why someone can’t do something today.