Maybe it's a good filter for them. If people start complaining in the interview process they will complain at work, too. Maybe such a process only keeps the ones who are eager and willing to work there and will continue their tasks even when jerked around ...
Nope, if that's the intention then it's obviously not working because Google employees are famous for complaining about everything, from the choices of microkitchen snacks to high-level decisions by SVPs (Google+, anyone?) to whether exceptions should be allowed in C++ to ..., well you get the idea.
* Worked at Google until 2015. Culture might have changed a bit since then.
I agree. I think that's at play here even if Google or their hiring department will never admit it.
Having a long, drawn-out process will dissuade a lot of older workers with families who may not have time to invest in practicing for the interviews or scheduling them all, again maybe something Google benefits from if they want to have young workers who are more easily shaped and eager to devote more time to their jobs.
