I think it's simply a question of what are Google's interests. Users doesn't pay anything to Google for the service, so that's not where Google's interests are. Advertisers pay Google, so that's where Google's interests are. Google has no interests to make the search better for users, they want to make it better for advertisers.
They still need to make the system appealing to users.
If users had higher standards, then Google would have to meet those standards or lose out on business.
To do that, you simply have to inform users about other available search engines and remind them again that those exist when one of their searches fails.
I think it's simply a question of what are Google's interests. Users doesn't pay anything to Google for the service, so that's not where Google's interests are. Advertisers pay Google, so that's where Google's interests are. Google has no interests to make the search better for users, they want to make it better for advertisers.
They still need to make the system appealing to users.
If users had higher standards, then Google would have to meet those standards or lose out on business.
To do that, you simply have to inform users about other available search engines and remind them again that those exist when one of their searches fails.