They were in relegation form with a divided dressing room and players criticizing his coaching, it wasn't really sudden. I posted the opinion of a Swans fan of him in the Laudrup thread about this, they were not sad to see the back of him when he finally did get the boot.
Go look at any Swansea forum and a number of supporters of theirs are very respectful of Laudrup.
Can you show me evidence of players "criticizing his coaching?" I'd like to know who it was that was criticizing him?