I think it's because a lot of new authors are too obsessed with the rewards that they get salty when they don't get much. They feel like they deserve a high vote early on and consistently. I was disheartened when I started posting too. The Splinterlands Challenge posts were the ones that really got me to stay. But as I talked to more curators, I found out that they are very critical of how new users act. Do they immediately unstake and convert to fiat, their followers/following, do they reply to comments/comment on others, etc. That's when I realized that I should treat Hive blogging as I would with social interactions. Find people that I find interesting and interact with them.