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Yes and no.
Perhaps not greatly worse than some satanic human rituals. Nor that different than rape, torture, snuff films.
However, Other than the class of humans in those groups, I don't know of any class/group of average humans that routinely abduct and rape victims.
And I certainly do not know of any group of humans that mutilates other humans like cattle are mutilated by the critters.
I don't even know of a group of average humans that treat all other humans as their cattle.
I disagree about Guy Malone. I've seen his authenticity in his personality repeatedly face to face. He may make some conjectures about some Scriptures but I have not observed him to twist Scriptures out of all contextual factors etc.
Then you are either young or not well read. Check out the treatment prisoners and civilians at the hands of Japanese and German soldiers and doctors during WWII. Read about the medical experiments conducted in German concentration camps or the killing contents in Japanese-occupied Chinese cities. The Japanese were also fanatical rapers of women all over China. (Read The Rape of Nanjing) Find out about the torture inflicted by representatives of the crown in any European country in the middle ages. Even the Catholic church tortured people to death in gruesome ways. How about those Islamic torture/deaths going on in modern times?
No, I have read nothing about ETs that are worse than our own treatment of man. Actually, the ETs seem quite tame compared to us.