I'd venture to say that this is all Larry Page. The start of this "myopia" seems to coincide with him taking over as CEO.

I firmly believe the opposite. To me, he is the one made Google focusing on what really matters for the future of the company. You need to make tough decisions sometimes and I think he was correct in "almost" all of them. (I have no affiliations with the company)

It actually started when Larry met Steve Jobs and was recommended he focus his efforts.

Ever since then it's been all about Google+ and finding new ways to force feed to everyone.

Interesting. Quite possible since the attitude adopted by Larry Page is the same one Jobs reveled in: 'I know better than anyone, even millions of users.'

This is in contrast to Google's previous data driven method of decision making.

Let us now daydream about the possibility that Steve sabotaged Larry.

Reminds me of this: https://news.ycombinator.com/item?id=4284524

To be honest, Vic is also to blame for that one too.

Vic runs G+. It is his job to grow G+. The person who hired him for that job is responsible for deciding whether that job should exist.