However I will say that Larian falls into the "evil is more cool and interesting" side of things than I personally care for. I'm not particularly religious or prudish, it's just that I think good can be just as cool and interesting, if not more so.
Yeah this seems to be one of Larian's permanent flaws, and it 100% is to do with Swen, because they didn't even have the same lead writers this time as with previous games, they two entirely new people, and basically whenever the writing was discussed in sit-down video things Larian did, Swen would be swooning about some utterly psychotic blood-drenched murder-option and going on about how he loved this kind of thing, and to be fair, the leadiest lead writer, even though he's new, did seem to be into it also, though I'm not sure how much of that is "I'd like to keep my job".
DOS1 and DOS2 are absolutely full of insane murder-options and most of the playable origin characters in DOS2, as written, are pretty evil or at least creepy/dark. Specifically:
Sebille -
Tortured and scarred slave who has lost her mind somewhat and intends to torture and murder her enemies, and has like special "extra-nasty" dialogue options.
Red Prince -
Failed Emperor of the racial supremacist and evil Lizardperson empire - he got exiled for banging demons, and likes to tell people how superior he is.
Ifan Ben-Mezd -
Mercenary murderer with a dark backstory - sometimes get specifically (and correctly) called out as a murderer by NPCs.
Lohse -
Demon-possessed and has barely managed to avoid doing a bunch of murders - but I guess she's not personally evil at least?
Beast - Uhhhh I can't remember who this is lol. He's a dwarf apparently? I guess I missed him.
Fane -
An undead guy who can cut off people's faces and wear them. He is the most sane and nice origin.
DOS2 in general is an incredible "crapsack world" trope setting, in that virtually everyone you meet is either outright evil or a victim, or sometimes both.
It's worth noting that when BG3 first launched into Early Access, it was pretty much the same way. All the companions/origins were significantly nastier than they later became (yes even Gale, who was also less joke-y - Karlach wasn't a companion then), and many of the situations in the launch Early Access were only given lose/lose ways to resolve them (or just like "you can be brutal, greedy, or mean-spirited, which do you prefer?").
This got a ton of negative feedback, though, from the EA players, and to their credit, once it had been put to them that they were just replicating DOS2, that all the origin characters were unlikeable, and that this was D&D, and the Forgotten Realms, not the ghastly Divinity setting, so heroism needed to be allowed, they started altering course pretty rapidly. There's still a rather excessive amount of grimdark-ery left in BG3, but at least you can actually play a heroic character, which you literally could not at EA launch.