I briefly tried R2 and there were so many issues and absolutely no way to contact anyone at Cloudflare about it.

Backblaze weren’t much better - they at least have support but they won’t actually fix any issues even when you hand them scripts that reproduce the issue.

I’m evaluating Bunny’s S3 storage now, but I can’t use it for production while it’s still in beta. I had problems with it but Bunny listened and actually fixed them, to their credit.