S1E1-E2-E3 safe S1E4 about 10 minutes in, when they wake Frye up and get him out of bed, he v….ts. It’s brief, both audio & visual. S1E5-6-7 safe S1E8: about 40 minutes in, Marco is examining the dead body of Santi Jr when he gags and v…ts. Both audio & visual. The rest of season 1 is safe. S2E1 at about 28 minutes, Delangis v….s. It’s very quick, audio only.
The main antagonist in s1 is a man who lost his family and it's clearly unstable takes revenge.
Similarly the main male lead starts acting out and acting violently after becoming unstable after losing his son
A man mentions how he was "kind enough" to cut of a man's genitals to send it to his wife so she wouldn't get lonely after he killed him. It's not seen but mentioned.