[neotokio]

I think there are few things to consider here,

1) Google CANNOT provide you with technical search, because choice of index/query filters is always limited (ie. Do I prefer exact matches over multiple matches?)

2) Google has shareholder & public responsibility. It means that service is adjusted (and it's 'algorithms') towards biggest type of queries performed.

All of this is a constant battle between precision and recall for given query. Adding to complexity, Google needs to account for

* Extraordinary amount of users using their search

* Extraordinary amount of data on webpages

* Importance of authority

In smaller search engines (ie. shop full-text search) you usually adjust towards one use case. This in itself is already hard.

Google does that for all possible use cases, for all possible queries while still fighting same precision/recall battle.

To be clear. I think google is terrible, but I also think that there is no other option for them at this point.

All of this became clear for me the moment I've got interested in build search and relevance engines.