Medieval times were brutal

I’ve been reading this book on medieval culture from time to time. Mostly talking about what it’s like to be a person from the 14th century. This book has made me more appreciative of the life I’m living right now, even if everything is deteriorating around me. One of the punishments that were commonplace, was the ripping out of intestines and forcing the victim watch their own guts burn in a fire, the victim was still kept alive because the executioner is careful to tie their organs back together to let them live long enough to experience this horrific act. I can’t wrap my head around why one would go through all this effort to cause someone more unnecessary suffering. There were more forms of punishment I read that are arguably more gruesome, but this one was more intricate than the others. Because of behavior like this, spending so much unnecessary time and thought to cause another more suffering, I could never imagine humans as being naturally good.