I didn't fail those portions. Actually did quite well on them. So did my friends.
You are making a number of invalid assumptions, starting from the assumption that their processes are fundamentally accurate or correct. My supposition is from the viewpoint that all systems are fundamentally flawed, and the goal is to minimize risk associated with a flawed system.
I know it is generally hard to acknowledge that google does things wrong, but ... IMO (and I am fairly sure I am not alone here) ... they have a number of significant issues that they haven't quite moved past yet, and this is one of them. Remember, they started out with brain teasers, and school pedigree. The new system isn't demonstrably better IMO, but it helps them convince themselves that it is.