First clip he follows his man then has to get out wide to cover Pulisic's man, is he meant to cover everyone?
Second one you even say their player goes from the left to the right hand side of the pitch. If Kovacic follows he ruins our entire shape, do you understand that?
Third one Kovacic should have done more to show him out wide but that's more on Emerson being spun so easily.
You're a really weird bloke with this agenda against Kovacic, it isn't healthy. Perhaps sign out for a bit and take a breather from the forum, might help you mentally.