Anything to avoid the horrors of modern air travel and having to deal with airports like the one in Vienna.
Vienna International Airport is easy to handle, not much waiting time, rather compact layout, self-checkin of bags.
Problems start if travellers are ill prepared for departure, i.e., the number/size/weight of their luggage does not meet what they have payed for, not being aware that certain airlines require a hefty payment if you have not already your boarding pass, having carry-on luggage which is bigger/heavier than permitted, the names on their id does not match exactly the names printed on their boarding pass, the travellers are unable/unwillig to self-checkin and prefer to wait in a long line, carring items which will be seized at the security check, etc.
I don't know what Mr. É's complaints are about Vienna's airport, but I know much worse airports. I guess everything is better in Budapest. :-)