Jaylon's career was weird. He took a year to get on the field. After getting juked out of his shorts early he then got better for a couple years culminating in a pro bowl nod. Now I get that doesn't mean he is elite I do think it reasonable that he was better than average. Then he fell of a cliff production wise.
Now, I do think a lot of that is because teams figured out how to scheme him and he couldn't adjust. But I also think that his football IQ was pretty low. I cannot tell you how many times I would be yelling at him to watch for the Y trying to cross behind him as he stared straight ahead. Now he would be trying to mirror the QB but zero instinct as to what was going on. The proverbial blind dog chasing a pork chop.
The contract was abysmal. $24m could have been much better spent.