Main reason is the coach sucks and didn't take the right players and isn't using the ones he took properly.
The diving is just a....well it's just one of those things Italy players are well known for. In fairness it has been beneficial for them over the years and once in this WC. It just seems shady to see big strong athletes go down so easy flailing their arms and legs around and moaning like they just got kicked in the jewels.
that's why I rarely follow soccer...a player takes a love tap & they act like they're dying
if you want pain, take a dead shot from a 250 lb linebacker