After some days of trying, I keep being rate limited. I don't know if I'm banned, but I didn't upload any other speedrun and It's kind of unfair yk

you only joined 2 days ago I'd just wait a few more and then try again. It's likely that you need to wait a certain time before uploading speedruns due to spam. It would make sense for it to be ~a week

I don't know if I'm banned

You're not banned, you wouldn't be allowed to do anything or make forum posts if you were. And your username would be greyed out.

Can you submit runs now? As this is just the site being annoying