If I post high quaility massages but none of the users give me merit. What should I do? How can I get merit?
I can publish messages for years and not receive anything
That's the only way. If you are not getting any merit for years, then your posts are most likely the problem - and not the users. Getting merit isn't hard.
Maybe stop with bounty entries since they are 80% of your post history. And you will NEVER get any merit for those.