Here is something to think about.
Nature is awesome but she makes mistakes.
If Nature didn't make mistakes the some deity made them.
Either way, mistakes were made and here is a list of creatures which I consider to be mistakes because they cause nothing but misery and serve no apparent purpose on Earth but then saying that, what is the purpose of life on Earth?
Wasps
Tsetsi Flies
Honey Badgers
Theresa May
Donald J Trump
Mosquitos
Bott Fly
This is just a few of the many thousands of creatures that I feel are a waste of cellular material and DNA.