"most of the upvotes is not done on basis of the content, and this is the main problem"
Agreed. We need to figure out a way to make the curation formula make it most profitable (and not prohibitively more difficult) to vote for quality content. I have begun considering options that would avoid taking more of the reward pool, such as also rewarding rep from curation (or a separate curation rep that affects your rewards from doing so), or some other way to incentivize users to curate better.
I'd like to make it so that users wouldn't want to self-vote out of economic self-interest.
"since Steemit is super new. "
I'm not disagreeing with you, but in crypto terms, Steem is actually more mature than most of the market cap list, and survived it's first 97% death spiral drop. That's one reason I'm here.