Sometimes I get mad at my aquarium fish for different reasons relating to something they do directly or something which happens. I got mad when I originally got my fish because the tank got a bad case of Columnaris that killed of a large percentage of the fish I had recently purchased. I also get mad when I am trying to do a water change, and the baby guppies keep getting in the way because I'm worried that I may suck one up and kill it.
However, I very rarely get mad about my aquariums, maybe only three times in the years which I have had them. I really do enjoy having them and they are really fun to watch when I want to relax.