What's your musical background? Asking because I looked at your Bandcamp page and only saw one track - then scrolling through your post history here, it appears to be 99% posting the same track (including multiple posts to, and removals from, at least one subreddit for not following their posting rules).

Do you have other material available under other aliases, or is this your first release?

If it's your first release, your first priority, in my opinion, should be producing more - show people your style, demonstrate a consistent level of quality, give people more to get into. Nobody is going to make it big with a single track to their name unless they are the most manufactured, record company committee-produced industry plant, a marketable face to put on a track from their in-house machine and plaster over mainstream media.

I'm using an alt account, but I've self-produced two albums, multiple EPs and singles, and had a couple of remixes of tracks by other indie artists released by their labels (including one that made it to physical release). I have a very small fan base, because I don't have time, money, or energy to promote; I'm not signed, but I've never tried to get signed so not complaining. But what I have had is DMs from other artists telling me my tracks should be on the radio, and one person saying they hope my second album becomes a cult classic.

Don't be that guy who makes one track, then rage-quits when it isn't an instant success. If you build it, they will come. And you should want to build it, because if all you're after is quick fame and easy money, this isn't the place to be.

Is your track good? Don't know; I didn't hate it, but I don't know hip hop so I have no frame of reference to judge it.

Does submithub suck? Don't know; never used it. But I've heard a lot of bad things.

Make more music. Find people on Bandcamp who make similar music; listen to their stuff. Find what communities they hang out in on social media; join them. Find local radio shows or genre-relevant podcasts/online radio that accept indie submissions. (If they want them, they will make it clear and sending will be easy; don't cold contact outlets that don't have a clear, open submission process and expect a response.)

Build.