Complex sentence: Eventually Kirillov seems to be overcome by the power of his desire to kill himself and, despite his misgivings, hurriedly writes and signs the suicide note taking responsibility for the group's crimes, including the murder of Shatov, and runs into the next room.
Split into simpler sentences: Eventually Kirillov seems to be overcome by the power of his desire to kill himself. Despite his misgivings he hurriedly writes and signs the suicide note taking responsibility for the group's crimes, including the murder of Shatov, and runs into the next room.