they are troll accounts or what else ?
Well, it is not a matter of trolling, it is a matter of gaining more privacy. Reusing bitcoin address is bad for privacy. Reusing bitcointalk account is the same thing. And since sticking to the same account is more and more harmful for privacy, people are using many accounts.
A newbie in bitcoin talk ,, talking exceptional well.. is not a newbie in cryptoworld..
Of course. But sticking to the same account is also harmful for quality. Imagine that someone is getting hundreds of merit. Then, it is difficult to talk normally, because people follow authorities and they often do not even consider that some authority is wrong.
Also, it is useful to have some people that still think creating pools is possible. Bitcoin is double spending resistant, so people are constantly trying to double spend coins to prove it is secure enough. Luck is created to be pool resistant, so people will create pools to prove it is inefficient. But since merged mining comes into play, it is always more profitable to get both rewards from solo mining and rewards from pools than getting only rewards from solo mining.
Edit: And about exchange: if this coin is going to get rid of all mining pools, it probably should also get rid of centralized exchanges and be traded at some DEX, for example AtomicDEX from Komodo. Also, Smart Chains can be always detached from Komodo and attached somewhere else, so there is no danger of being "centralized by Komodo".