My theory is that Google is notably worse at this because their core advertising business is so profitable. Most companies would have been forced to become good at managing projects by necessity but until ad revenues substantially decline Google can subsidize a ton of inefficiency and still report good numbers to Wall Street, just like Microsoft's various write-offs in the 90s and 2000s.
It certainly doesn't help. I refer to this as the "Mississippi of Money" problem. If a river is deep, wide and fast-flowing, you can do pretty much anything and still get somewhere.
The rest of us have to make do with leaky canoes, going up a certain creek, often sans a paddle.