https://twitter.com/brickwallblitz/s...443692547?s=21
Well lets talk about each GIF, starting with the first.
The very first GIF Watkins gets a step early, but the DB is stride for stride with him at the top of the route. The ball may be slightly underthrown but that's nitpicking. It's a catchable ball put over the top of his shoulder that he should've come down with. The tight coverage is what caused the incompletion more so than the throw.