TL;DR
Okay, first off, you seriously need to fix how you word this; everything you wrote here... is in a cluttered mess, and I'm sure you won't fix it because no one fixes their posts. If you do fix your post, organize your thoughts into paragraphs; take big-boy steps and organize your thoughts cohesively so me, as a human, can read this and comprehend what you're saying.
Secondly, actually get straight to the point. Stop adding filler to what you write; we only want to know what you're getting at from the thread title. You ruin your own writing with all this filler.
That said and put aside, let me try to digest some of the things you wrote.
I'm going to start here. Yes, people complain on online forums. Are you implying that players aren't allowed to complain on a game's forums?
The whole point of the forums is to allow players not only an outlet to express their problems maturely, although 80% of the people here can't seem to do that, which is sad, but also allows them to address issues in a game that come to the attention of the developers. People could post problems on Reddit, but an official games forums is much more convenient and easier for game developers to access when considering what's wrong with their game, and how to fix it.
If players didn't say ANYTHING that was wrong with Blade & Soul, this game would turn into a dumpster fire. The fact that people are stating problems is good; the issue, though, is that some people are stating problems that don't really help the game; these problems are more like problems with them not being good at the game to begin with.
What's making this game go down the gutter is:
1.) NCSOFT is greedy
Since NCSOFT only cares about making money, most of the designs and decisions made for Blade & Soul are geared towards profit over player-interest and positive reception.
2.) The general community is toxic and unbelievable
That's not to say all players are like that, but both on the forums and in-game, there are a large majority of players who are toxic, and ever since the merge, we've had more toxic people in Faction chat. For the forums, when people make mistakes on what they type, they're berated for it rather than simply being told that they made a mistake, and that makes the entire conversation go from constructive to outright hurtful for the person that made it.
3.) There's a lack of public reception
This game is an eastern game, and it's more popular in Asia than it is in the U.S. and Europe. As an NA player, we don't get the updates KR receives until a month or two later, at worst, a year, and this game has poor publicity in the west right now due to people continuing the P2W hate-train online and further giving this game unnecessary levels of hate.
4.) There's poor community engagement
No matter what we type, NCSOFT doesn't listen. How do I know this? Look at the changes made in the game; very few changes come from our feedback; that's a sure sign you know NCSOFT has closed its doors to use, leaving them only slightly ajar to let some air in.
And there are many more problems. Complaints on this forums alone doesn't mean the game is being destroyed. Rethink that aloud and see why that's illogical.
Haha... people still saying the server merge is killing the game... ah...
Okay, realize that not everyone stays with a game they initially play on. Players come and go for varying reasons. Server merging is becoming a more-common practice for MMOs, and these merges happen to save money, to consolidate space, or to unify communities that are better off together than on their own somewhere else. Additionally, as games age, they lose players. I keep hearing players say how 2016 was more active for NA; yeah, that's because that was when the game was released, wake up; of course it's going to have more players. This game is about 4 years old for NA now, so obviously the game's going to lose a lot of players, and that just has to do with aging, but also what direction the game is headed.
As for the merge for this game was successful, albeit it brought in the worst of the player base into Faction chat. There were issues here and there, but for the most part, now public chat is more active, finding dungeons is slightly easier, and the marketplace is more active. Server merging != dying game definitively and immediately-conclusively because there are other factors that lead up to a game's demise.
I would type up more, but I won't because no one's going to listen. But regardless, you seriously need to reorganize your thoughts in this thread.