To replace Pichai the two largest Google shareholders would have to give a shit about the direction of the company. But they've been absent for longer than Pichai has been CEO.
Yes. Normally people are too quick to attribute power and fault to individuals, or so everyone says, but here's a case where two individuals really seem to have something close to full power and ability to fix at least the more obvious and readily fixable problems—they simply choose not to—and yet people usually diffuse the blame among "Google" or "the incentives".