Though if you scrape them for minor bits, you find some minor hints. For example, one of those fawning admiration posts about him, two years ago, mentioned that he killed the Android laptop project, because it was competing with his own project, Chromebooks.
I recently heard the 'tack Android apps onto Chrome OS' strategy described as a "trainwreck" by a Google employee, and that ship has now been righted: Android is working on multi-window views in Android 6.x, and it's looking like Android is once again looking at a single converged OS for multiple form factors.
Ubuntu and Windows, of course, have been working on this for a while. Had Pichai not interfered out of his own ego for his own pet project, Google would be leading this curve, not trailing behind. As another commenter said above, "There is a lag between management incompetence and revenue". But Android was leading this until Pichai got in the way.
Between a huge stumble like this, that the media barely even noticed, and the fact that under Pichai, Google has lost almost all consumer trust, I have a hard time believing Sundar doesn't deserve a large helping of the blame.
And considering the stumbles the ad market, their primary business, is having, being a strong device platform provider, which they've already shown they can monetize (outside of ads, Android is probably their next most profitable space), is really key.