I am a total ignorant about search engines and I have a question after seeing all types of comments and projects popping up lately and criticizing Google result

I am a total ignorant about search engines and I have a question after seeing all types of comments and projects popping up lately and criticizing Google results which is if it is realistic to think that something similar to Google could exist. It seems to me that there are all sort of tools out there to do so such as all the public NLP implementations, vector search engines, ... and I wonder if it is that not everything that is needed is truly available, it is a matter of the needed resources to have something working or is just a matter of the products already existing and not getting traction (and I am not talking about the other big search engines).