Honestly, I didn't find it as bad as people said it was. Sure, the overall chemistry between the iron triangle was off and really odd compared to the other ones I've watched so far, but I was able to look past that because I wanted to watch the whole series. This one does not continue off from the Lost tomb 2, so it might be confusing for some people.

PROS
The acting was okay, many people complained about how the actors were bad, but I think it was honestly a direction problem. I think the actors tried their best given the direction and how their characters were written for this one. In fact, I found Wu Xie's character a little adorable at times and it was interesting to see a Wu xie with his own faults.
-The ending music is quite good.
- FATTY played a very good role in this series. I personally thought he was the best part.

CONS
-NO CHEMISTRY between the iron triangle. Qiling felt very distant from Wu Xie and Fatty and didn't seem to have the same connection as the previous seasons.
-Left me with a lot of questions. I didn't know what the ending meant and there was various situations which left me hanging and not understanding the purpose of the scene.
- Barely any action. It really really disappointing that I could barely see any cool Qiling action like the other series.

Final opinion - I would recommend to wait until 6 or 7 episodes because it definitely gets better after that. I would also recommend to give this chance, at least to catch up on the story. This is definitely not the best one, but it's not as horrible as some people claim it to be. I think this is a one time watch for me unless I decide to rewatch the whole Lost Tomb series again.