Complex sentence: An assassin with perfect accuracy and deep-rooted pride of it who is hired by Kingpin to kill Nikolas and Elektra Natchios, but when Daredevil gets involved and causes him to miss his target, he makes it his own personal vendetta to take Daredevil down.
Split into simpler sentences: An assassin with perfect accuracy and deep-rooted pride of it. Bullseye is hired by Kingpin to kill Nikolas and Elektra Natchios, but when Daredevil gets involved and causes Bullseye to miss his target, he makes it his own personal vendetta to take Daredevil down.