I don't dislike most animals. I love all of God's creatures… sometimes with barbeque sauce. Except chihuahuas, screw those guys
In all seriousness though, aside from the bitey and parasitic insects I enjoy animals for what they are. The only reason I dislike chihuahuas is their behavior within the realm of a domesticated animal. However, just like a small child that will kick you in the shins, punch you in the nuts, and scream until they get what they want, I've found with chihuahuas that punting them into a wall just once usually solves the problem.
My wife on the other hand does not like larger birds. She thinks chickens, ducks, and geese "look weird" and "shouldn't be able to stand up, shaped like that". She does, however, like them with barbeque sauce.
The only reason I dislike chihuahuas is their behavior within the realm of a domesticated animal.
Don't blame the animal, blame the owners who fail to properly train them and let most troubling behaviour slip because "Isn't it cute? 😍". Now imagen the same behaviour from a dog 7 times its size and 20 times the weight. In essence most Chihuahuas are spoiled brats with a enabling parents.