Brugor are voracious, horny and irrationally violent. The worst qualities of man and beast mashed into drunk, shrieking, manic bullies. They are a scourge on the earth.
The Brugor exemplify the bestial excesses of humanity: unrestrained appetites, poor impulse control, and vacillation between slovenly sloth and irrational aggression. A parody of toxic-masculinity.
This is a tried and true archetype in fantasy (particularly in games) and I can't claim any originality in the basic shape of these adversaries. Like many before me, I take inspiration from Glorantha's Broo and Warhammer's beastmen. Arnold K has a particularly good rendition (here and here).
What are the Brugor?
The Brugor are an all-male race of horned, hairy, cleft-hoofed, animal-headed humanoids. They breed prodigiously with domestic livestock and can reproduce at an alarming rate. Given access to a heard of cattle, they'll produce a horde in a matter of months. Their young are standing within minutes of birth, and on the hunt shortly thereafter.
The most common varieties vary with the breeding stock available in an area but the most often seen include bovine (i.e. minotaurs), caprine (goatmen), ovine (rams) and cervine (stags) types. Often an outbreak begins with wildlife, before moving into settled areas and afflicting farm animals.
They are carnivores. Their preferred feed is humans but they'll eagerly devour any animal they can catch that they can't impregnate.
While clever enough to use tools, they lack the industry to make them. Any weapons they use more advanced than a sharpened stick will be plundered from humans.
Herds form around particularly strong individuals and raid together, becoming bolder as their groups grow larger. Fortunately, they are fractious and disorganized so warbands larger than a dozen or two are rare. Occasionally, they'll be forced into the service of a non-brugor leader but it is almost never worth the effort.
Left to their own devices, brugor lack the social organization to form settlements or coordinate anything but the most haphazard raids into human territory. However, their mean little minds are perfectly suited for infection by Baphomet.