The glass was all wrong. If it actually had shattered the way they drew it, yes, he should have been cut to pieces. But they don't use that sort of glass for cars, because of the "cuts you to ribbons" aspect of it breaking when people fly into it.
If it were actually the glass they used in windscreens, it should have either broken into small pieces, with the entire windscreen having shattered upon impact, or the glass should have fractured but the glass shouldn't have gone flying like that, but held together.
Also, I noticed that Kyle fell victim to the Green Lantern's one weakness - head injuries.