4 guys is enough to rush the passer. In this case, they got beat by the OL. Our DL just has not been consistently very good, and that is the problem. Send a man to blitz, and we're sacrificing coverage somewhere. Of course you can bltiz sometimes, but in this case the likely result would have been someone in the flats making a killing, which they did, over and over and over.
That one WR didn't really beat three guys. Mainly he was the responsibility of I think, Harvey Jackson, the deep safety on that side of the field, and Jackson let him get behind him. AG wasn't lined up man-to-man on him, so he was probably in a deep zone of his own on the bottom side of the field. SJB, the third guy, was way on the other side. I'd have to say that Jackson blew this coverage big-time.
And I remember distinctly from watching the other angle via replay on the TV, which isn't in this highlight, that it wasn't a matter of time. Jackson 'blew it' early on. Bad position.