Have you analysed the reasons why you are having hard time getting a merit:

1) Are you making the required effort: I went through some of your old posts and it clearly shows that they are not of very high quality. Since there is huge competition for merit points, you will have to defeat others in terms of quality.

2) Are you making enough posts: The number of posts you made so far are also very less. The more posts you make, more are the chances of getting noticed.

Finally, you also need to active and creative to increase the chances. For instance, some members are getting good number of merits for images they created.