This drama really had a potential regarding the story, but in the end it's a giant disappointment.
[SPOILERS AHEAD]

Here's the list of my disappointments:
I had really enjoyed it until I realized that there will be no justice served to anyone. But from the beginning:
1. The main love story is not very attractive or believable. The female lead is completely unappealing and weak. The struggles this couple goes through don't make your heart ache, it's just "whatever" tbh.
2. I was liking the show because things weren't always predictable and it wasn't obvious who was the bad guy. That's great. Unfortunately they really SPOILED everything massively by taking the joy of finding out who it is killing those who deserve it away from us. There's no joy left at the end of it. There's no REVANGE, there's no spectacular misery for those who deserve it, there's no realizing things in time to stop them. NOTHING. You wait for justice forever, and then when the time comes, what you're given is an irrelevant death that no-one witnesses (Situ Hong), or worse, forgiveness to those who deserve to be killed by dismembering their bodies (Ji Rong).
3. EVERY likable person in this show DIES.
EVERY SINGLE LIKABLE CHARACTER. Literally 4 people survive the show till the end and it's not like all of them you'd even like to survive. I'd definitely swap Qing Shi for Yue, e.g. I know Qing Shi is Xue Ying's only family left (that's also ridiculous, but even the uncles don't make it alive), but given his role in the whole disaster, he's one of those that deserved to die and didn't. And considering only 4 people make it till the end, it's really unjust.
4. Qing Shi and Ji Rong. (and Bai Yuan Zhi) - the amount of forgiveness Ji Rong has received is beyond unbelievable. Until the very last moment she keeps on being a disgusting thorn that you wish to burn alive and yet she keeps on being rescued, defended and forgiven. THE MAIN REASON WHY SHE KEEPS ON DOING EVIL IS BECAUSE YOU MOTHERFUCKERS LET HER DO IT!!!! SHAME ON YOU. Also Sing Shi is incredibly thick and stupid. And then after all the disasters he plays the "smart guy" who also inherits the very intelligence point as a commander. I'm sorry, what is this reward for? For CAUSING the death of everyone in there by being dumb as fuck and trusting again and again a bitch that had already been proven to be the enemy???? This is more than I could take, seriously....
5. Because only 4 people make it alive, there's no feeling of reward whatsoever. Imagine, ALL THE ELDERS, everyone from the Changfeng Academy (!!), friends, families, etc, EVERYONE dies. Then at last we have the main couple alive, the idiotic brother that allowed Ji Rong destroy half of the world and a one single friend that even ten years later is crying after his lost love who also died in the last battle.
It doesn't matter that they give you a "happy ending", "happy world" in which civilians live a peaceful life. WHO CARES about the people that were never a real part of the show. We care about those that we've been seeing the whole show long, the friendships that were made, the teachers that were lifelong treasured masters etc. And there was a lot of valuable characters in the show. Why must have they all been killed? The last few episodes is A WASTE OF TME and a GIANT DISAPPOINTMENT.

I would have really rated this show higher if not for the bitter anger you left me with. What's the point of creating an interesting story if you're gonna destroy it like this later on? -.-