Seriously? Why is all the hate for de Normandie? Why does everyone hate my lovely normans?
Apart from the very obvious fact that they are OP and conquer England %99 of the time, as long as William stays alive.
Hating on the Normans is very historically accurate.
The Pope hated having uncontrollable princelings in Italy, the Byzantines hated them due to the common Norman tactic of picking off chunks of Byzantine territory, the HRE hated them for usurping lands it felt belonged to it, the Northern Italians hated them for being foreign.
Ok, maybe Venice. Venice might have liked them as they seem to have had no ships of their own, so were always hiring Venitian Fleets.