The merit system is not working, look the merit points of people on the forum, it does not move (even for the more relevant posts), the forum established a system which was suppose to penalize newcomers flooding the forum with useless post, but the forum penalize itself, good luck everybody, If you think people will give you merit points for free you are mistaken.
Let us not easily jump into conclusion. I think we need to be patient with Theymos and the mods as they approve new merit sources. As the number of merit sources increase, (hopefully) the number of members that will evaluate every posts will increase also resulting to the sufficiency in the merit distribution.
I empathize with you regarding the frustration that even though some of your posts can be considered as quality posts, you are not receiving any merit which makes it hard for you to rank up. This is the result of the transitioning status from the previous ranking system to the new ranking system (with merit system). As I have said, we are only in a transition period. Sooner or later, everything will settle down.
Do not worry, you are not the alone in this journey of being affected by this transition and changes. The higher ranked members (especially the senior members, full members, and hero members) are the ones that are greatly affected by this merit system.
Overall, we need to get back to the real intention of introducing the system - for the benefit of the forum and everyone else. The Merit System is not designed to harm anyone. If you find some abnormalities regarding it, don't just judge the system but be an innovator.
Think about it, Suggest solutions, Discussed with others, and find ways to improve it (or to perfect it).