It looks more like something(s) hit the nacelle, rather than any of fans spontaneously self-disassembling. I do see that at least one blade is missing, but it looks more like the result of something impacting the nacelle and shrapnel from that impact knocking off that blade. I am impressed that the rest of the fan didn't explode once out of balance from the missing blade.
And whatever impacted the window, would cause it to blow OUT, and not into the cabin.