I agree with you that right now Steemit is pretty much a worse version of all its competitors. Steemit is worse than Reddit. DTube is worse than Youtube. DSound is worse than SoundCloud. Dlive is worse than Twitch. But this is temporary.
Now that a middleman doesn't take a disproportionate share, there large economic incentives to transition these platforms to decentralized ones.
Look at https://www.alexa.com/siteinfo/d.tube & https://www.alexa.com/siteinfo/steemit.com . These sites are rapidly growing even though the ui and content is worse. They will keep growing because there is an economic incentive for content creators to use them.
Even better, if you can figure out a better ui that hasn't been invented yet, you instantly have access to platform with hundreds of thousands of users. Centralized companies have to grow each new product from 0. With steem, any new tag you create automatically gives you exposure through steemit.com
Right now it's worse, but it's getting better and it's going to keep getting better.
RE: Why Should an Investor Prefer Steem/Steem Power over Bitcoin?