I am a regular visitor to Vienna and I have never encountered this kind of behavior. On the other hand, I would not have expected or asked for 2 euro change, but that is me.

In my experience, while tipping is fairly common in Austria and many other EU countries, the aggressive tip soliciting that is the rule in North America is not. I am sorry that you found a bad apple waitress, especially in Austria where I have always found staff to be particularly kind and courteous.