No, you can't single him out like this: Since Mavericks, OS crashes are very often reported, and Chrome tabs seem to be often reported as a cause. I myself have never had crashes with Snow Leopard and I see them often in Yosemite. That's exactly why we see articles reporting the Apple has lost the Quality ground.

I have exactly the same problem on multiple machines.

Plus, the wifi fiasco, over which more than one person should have been fired.

I am barely sticking with Apple for now, mostly because in startups it is the default, but I don't plan to replace my apple equipment with more apple products.