I will say, The Untamed is an extremely beautiful and well-written series. I am not normally the type to watch long series, but this series has a deep plot and characterisation that keeps you entertained and curious throughout the episodes. That, I will give them.
Most, if not all, characters are memorable and they all have their own beginnings and endings throughout the series. The background and costume design is absolutely stunning, and you can see how much time and work went into creating this series. Some complain about the CGI used, but I have personally seen far worse.
My only gripe with this series are various plot points + cultural aspects of the series that I personally disagree with. These may be minor to most, but I still feel the need to mention them, as they brought down the score for me.

First, the censorship of several queer relationships which were present in the source material.
Second, almost all major female characters die. These include: Wen Qing, Jiang Yanli, Yu Ziyuan, Qin Su, and Ah Qing. On top of that, aren't Wen Qing and Jiang Yanli cultivators? We only get to see Wen Qing do something badass, while Jiang Yanli dies in the most "women in refrigerators" way possible.
Third, and I admit I'm being petty here, but the Yi City Arc felt somewhat out of place. By this point, we know Xue Yang, but have most likely already forgotten who Xiao Xingchen and Song Lan are. Their story felt weirdly rushed ad slightly unsatisfying by the end.
Fourth, also petty, Meng Yao is absolutely demonised for killing his father. It is absolutely horrible how he orchestrated the murders of so many people, but the series seems to put most of the weight on the patricide. Personally, I feel that Meng Yao was completely justified in murdering his father.

I felt that I needed to provide reasons as to why my score was lower than perfect. This series is really good, and definitely worth watching, but has some minor flaws I felt dragged my score down.