Original sentence: Despite the improvements, the circuit became unable to safely handle the increasingly faster and stiffer ground effect cars of the late 70s and a few horrendous, sometimes fatal accidents (such as those that claimed the lives of Helmutt Koinigg and François Cevert)and increasingly rowdy segments of the crowd began to tarnish its image
Edited sentence: Despite the improvements, the circuit became unable to safely handle the increasingly faster and stiffer ground effect cars of the late 70s and a few horrendous, sometimes fatal accidents (such as those that claimed the lives of Helmut Koinigg and François Cevert)and increasingly rowdy segments of the crowd began to tarnish its image