Plenty of really well drawn content, but half of it doesn't fit the premise at all. I wish there was an "ugly bastard" tag on F95, because it applies to the way too many scenes in this game, both sex scenes and general interactions.
As many others said, this game fails to deliver on a promise it makes. It's not an explicit promise, but the premise of Kerrigan being captured by The Zerg makes you think of, well, all the zerg-related content you can think of. Instead, you barely get any zerg content until chapter 3, and all of the Stukov content you never wished for in the first two chapters.
At this point, I genuinely fucking hate Stukov. Partially because the game pulls a bait and switch and has just enough zerg stuff in between all the Stukov's human scenes, but mostly because he's just an awful character. He's an ugly bastard mixed with a comic relief, and there's absolutely zero redeeming qualities to him: he's unapologetically horny while trying to be funny and disregarding Kerrigan's reaction. Sounds tolerable for an optional character with a couple scenes, but he isn't. He takes up more than a half of screentime in the first two chapters.
Even worse, the parasite that Kerrigan is infected with in the intro — a completely fucking alien entity that has an ability to control both body and mind of Kerrigan — is basically Stukov's best pal who regularly chimes in on his human jokes while being a passive-aggressive little shit in general.
Imagine if you were in the most fucked up stressful situation of your life while being stuck with two borderline sociopaths who comepletely disregard your fear and confusion, albeit for some dissmissive "it's fine, it's cool, don't worry about it" remarks. Sure sounds hot and steamy.
The writing quality of the first two chapters is pretty poor overall. Nevermind the fact that Stukov shouldn't even be in Koprulu sector and some zerg having full sapience: sci-fi smut feeds on sci-fi smut logic. But the story has no direction except for "you need to become more open" or whatever. Characters don't feel plausible, let alone genuine or sincere. Stukov turns the whole thing into an awful sitcom. Playing from Kerrigan's perspective doesn't serve much purpose: she is disgusted by Stukov's actions until performing enough mental gymnastics without much introspection. You don't have control over her opinions, you're mostly just sharing her point of view. For some fucking reason she starts to fall for Stukov, even though the only positive thing he has to offer is sexual pleasure in a place where even walls can offer that. You'd think that the only other human character would bring some moments of empathy to the story, but nope. Maybe they're stuffed away somewhere in the optional dialogues.
Ironically, sex scenes with zerg feel less weird, because Kerrigan doesn't have to bullshit herself (as much) into enjoying them. And the few zerg characters you talk to end up being more human.
I recommend skipping the first two chapters altogether. Maybe if you're into UB you can skip the dialogues, but for the rest of us it's just not worth it. This should've been some "Kerrigan captured by Terran Confederacy" story with zerg "experimentation" on the side.
Thankfully, chapter 3 almost fully focuses on interacting with zerg. Stukov shows up only in a couple or so scenes, and the new protoss girl perfectly fits the role of a more human character despite her naivety.
The writing is noticeably better. The scenes are way too bloated with dialogue, but whatever snippets I bothered to read after the previous two chapters clearly show improvement. There's finaly a sense of purpose, an actual goal that interests Kerrigan and has her go out and do stuff, she faces challenges with confidence — it's almost like she's a protagonist or something.
The characters are still silly and trope-y, it's still a cheesy smut premise and a lightheated storyline, but hey, now it actually works and delivers on the original promise. Plus, there seems to be more variety and player agency with a choice between Kerrigan and Queen of Blades.
So, overall, chapter 3 is a 4/5, shows a lot of potential and is already a good experience despite all its flaws, and if you specifically want monster content you should just start from there. But the first two chapters bring the score down. Don't bother touching them, getting a save or something for the few good zerg scenes they have is a much less annoying and tedious option.