I have been going to this cafe for many years and ...

I have been going to this cafe for many years and had beyond amazing experiences with service, food, etc. However the last two times that I went, Me and my friend where treated very badly by a man who I later found out was the manager. His name is Alexander and not only one but twice was extremely rude and unpleasant while taking our orders. When he saw that I decided not to tip him and he threw my card across the counter and walked away. I think that it's completely unacceptable for a manager to act this way towards customers, he should be setting an example for his team mates. I am so offended and will probably not go back there if he is on the front counter. Nobody is going to tip someone who has such a hideous personality and a face as unpleasant as his.