I guess this is a flooded engine? Start the car OK, move it and turn engine off. Try and restart 10 minutes later, real struggle but eventually starts, give it a good rev and seems OK.
I have heard that Audis can some times do this.

What is the proper technique for starting an engine when it is like this?

Why arent the electronics clever enough to cope with this? My Vauxhall never had this problem!!!

Colin