Awkward to rate, honestly. The series starts out with him (a random) just reincarnating into a villain's body, with a system. The start draws you in because it's more about face-slapping the 'protagonists' and getting some hot wives, and he's not really villainous. AND THEN, the protagonists (plural, because we move on from one to another) are all shown to be really not heroic at all - they're kinda trash.
Honestly, if it stayed like that, I would've enjoyed it. Unfortunately, the MC decisively proves that he is also a rapist scumbag villain, like the body he reincarnated into. So... yeah. I can't root for that type of character at all. And then of course, the protagonists actually start being good guys (rather than the first few who were trash in disguise). Then instead of convincing the heroines he's not that bad, and doing some manipulations, he's straight up brainwashing them and/or sealing their souls, infesting them with demonic items, etc.
So basically the start of the series implies he's not that bad, but dealing with being reincarnated into a villain, dealing with other villains, but not that long after he's an actual villain, and the people he's opposing are good guys (not all of them, but some definitely are).
Then to further confuse how to rate this series, the fact lies that the art is actually damn good, most of the characters are very well designed (and the women are super hot!), and the pacing is pretty good. I've seen the occasional part that didn't make much sense and people in the comments mentioned that the novel provides more detail, etc., but for the most part as an adaption, this is really good quality.
Too bad I can't root for this story. It's not even something you can enjoy getting people who betrayed the MC getting karma like a good revenge-flick either. It's just straight up this psychopathic rapist who kills and manipulates everyone. Even if they're innocent bystanders. ESPECIALLY if they're innocent.