That's because you're mostly unknown among the forums. It has happened to me back when I started, but just make your animations even better and longer and you'll get people's attention
Gotta be patient. I posted stuff on this forum for a year without getting comments nor upvoted. And then one day boom. Not that it really matters for me. I used to care about my rep and fame. Now I don't since it's just a number on a minecraft animation forum.