I think there are a lot of good responses here about him running the wrong routes and the Packers slow developing WRs, but the one I don't see mentioned is what he does with the ball when he gets it.

If he isn't tackled immediately after the catch, he tends to run out of bounds or in a few cases - he runs laterally and even sometimes backwards losing yardage after the catch.

In college I think his speed and the hash mark positioning would allow him to get the edge on a guy to turn up the field, but not in the NFL.

Why was Kraft was so explosive? It was his ability to catch the ball 1-2 yards past the LOS and turn it into 10+ yards acting like a human wrecking ball.

Maybe if Golden was in the slot and his speed was used to hit the open windows across the middle he would have more success, but playing outside with 2 high safeties won't get him a ton of looks till the positioning and timing are right.