Just adding onto that other comment by saying the described past abuse at the end is very long and detailed and heavily triggering. If you're sensitive to this, absolutely skip the entire monologue.
The antagonist knees a man in the groin in a restroom. Also tells one of his thugs he'll "expect him to chew someone's bollocks off on demand". He clarifies later he was speaking metaphorically, when said goon thinks he'll actually have to.
Two characters explicitly pass out in the movie. One from torture, the next from shock. Some are seen nodding off at the dinner table a couple of times in the movie, possibly from alcohol consumption.
Movie opens with the "theif" and his gang stripping a debtor in a back alley and smearing him in/force feeding him dog feces. Later a young boy is force fed the buttons on his shirt, and the thief cuts off his bellybutton before he passes out in agony. A Man is killed choking on book pages forced down his throat and nose by a wooden spindle.
Just for more details — at the seafood dinner it's obvious it's happening because Spica tells someone not to vomit and pretty immediately after that they do. There's some gagging beforehand, so once that starts I'd skip about a minute. The second instance near the end is when they're torturing the young singing boy, and after the boy passes out then a man walks towards the camera and throws up. I'd skip about 30 seconds to a minute once the kid passes out to skip it. Final time is at the very end and it's as Spica is bringing a fork of [SPOILER] to his mouth to take a bite and he pukes quickly before taking the bite.
The titular Lover (Michael), when formally introduced to Georgina by Spica asks him if he’s Jewish in a way that feels very predatory and anti-Semitic. Michael says he’s not, but later in the film he’s continually referred to as a Jew derogatorily. I’m unclear if Michael was lying or whether he is Jewish or not, but either way the anti-Semitism is still there.