It's 4.5 stars. I don't really see the problem. I love TLS, so much in fact that I am a Patron of the game, but it does have it's problems.
The performance isn't always great, the artstyle doesn't always fit well together. In particular monster and human enemies don't really look like they are the same artstyle at all. I am guessing because they probably use more premade assets there. As I already said the balancing can be wonky with a lot of sudden difficulty walls.
And for an adult game, I have to say the adult parts are not the best. The writing is pretty good and the art is well made and looks good, but it's not what I would call 'hot'. Some scenes work well for me personally, because they just hit my taste really well, but most don't really.
But overall I still love this game. The parts that it does well, which are it's story, choices and political setting, it does perfectly. So I personally would give it 5 stars, but I also understand other for whom the adult parts are very important or who gave up early in the game, that they would rater it lower for themselves.
So I think 4.5 isn't a bad score for the game overall.
On an additional note I would also say that starts very slowly. If you go in knowing nothing about the game, it has some parts were it can easily loose you. I would say the game only really starts once you meet yarra. But before that you have the section with the chosen, which is mildly amusing, but not exactly gripping. Then it feels like this is the real start of the story when Simon jumps out the window, but then the next section isn't really gripping either, but feels rather directionless. When I first played I got bored and stopped playing right after meeting Aka. I was so close to the part where it gets good, but before that part it honestly feels rather generic. The story feels like generic evil overlord but with sex and the worldbuilding feels like generic dark fantasy but with more sex. Things get vastly better and a LOT more unique once the story really gets going, but I understand people when the first impression isn't too great. As I said it wasn't great for me either and I only got lucky because I got bored at some point and decided to fire it up again and quickly got to the good parts after that.