I agree the reward system is not ok on steemit.
I am totally against the presence of bots On steemit Platform. It’s a social media platform, and social means human to human interaction ; not human to bot ; or bot to bot , as steemit has become.
When are launching your blockchain based social media?
I have following suggestions :

1. There should not be any time limit on receiving rewards. The readers should be able to upvote and reward the content creators for unlimited time. The content creators should continue to receive the royalties of their work until the blockchain exist. ( unlike steemit which has 7 day limit )
2. There should be strictly one account per person.
3. There should not be any bots or AI on the platform.
4. There should be 2 types of searches: one through the tags (as on steemit) and another advanced search that scans the entire content to match the words or phrases ( as in google)

If you incorporate the above suggestions in your social media, I am sure it will be way ahead of Steemit.
Do let me know when you launch it. I would like to join and would love to invest in something better than what we have here.