The phrase "horrible things" refers to actions, events, or situations that are extremely unpleasant, shocking, or causing great distress. Full definition
Similar and related words and phrases are presented below.
To be honest, I said a ridiculous amount of horrible things about formula feeding moms before I had kids. (romper.com)
And teenagers need to reflect on the kinds of experience that corrupt us morally: Why do otherwise good people do horrible things in war? (educationnext.org)