Doesn't seem like I can add any content with uploads, they don't accept anything

Are you saying you can't upload assets to Stock? 

If so, try using another browser:  latest desktop Chrome, Firefox or MS Edge, no script blockers or VPN enabled.

• https://helpx.adobe.com/stock/how-to/tips-stock-image-acceptance.html
• https://helpx.adobe.com/stock/contributor/help/submission-guidelines.html
  
  

Hope that helps.

The Adobe Stock site absolutely works. More than 500,000 assets are reviewed and added to the Buyer portal each week. If you would like user feedback on some of your rejected images, upload a few here and indicate the reason for rejection,