Orks had superior combat senses, something that Arcutrus experiences ifrst time, several times on his own skin when he was fighting against the Greenskins, either before or right now, as all of the remaining Greenskins attacked Arcturus with newfound ferocity and brutality.
Seeing that many of the other Boyz were killed by the humans before them, all of the Greenskins grew enraged at the same time because, for them, it was considered an utter disgrace to be overpowered by small humies, as they often called them.
Greenskins often looked down on the all species in the so-called "Human Group", they thought of them as small and weak, though they were able to respect some of them to a certain degree, such as the Asuryani.
Nevertheless, most of them were still too dumb to take serious note of them and often looked down on them, mostly due to their small stature and lack of huge build like even the smallest of the Ork Boyz.