The bugs dont fight like humans they rather fight like beasts, they whenever they take to fighting they fight to the very end unless the opponent gets destroyed or runs away. It is their instincts that make them have such legacy to foght to the last drop of the blood.
For example these ten fights are real cracker how insects take on one an other:
[youtube https://www.youtube.com/watch?v=JtRrNfbKKLg&w=560&h=315]