I found an actual bug in their infrastructure, on R2, which somehow still feels like a beta product.
I made sure it was an issue with them, not on me. I documented it. It's reproducible, tried it on another cloudflare account I own and the exact same thing happens when the conditions are there. I was doing work for them, for free.
So, I went on the Discord just to find out how poorly they treat people there. I insisted on this thing for like one or two days, IIRC. Several members of their team saw my post and dgaf. Eventually, I @pinged one of them (the one who I thought was the more appropriate one) and xir response was "that's not my job", damn, just cold like that, not even "but you could try reaching out ...".
I went on to look xim up online and turns out xi was something like the "developer experience guru" for Cloudflare, lol. I called xim on that, "hey, you know, this actually is your job" and xi doubled down, so I told xim "this is bs, maybe you're just a lazy employee" which got me banned from the Discord.
Since then, my stance on Cloudflare is "take whatever I can get from them for free, and never spend a single dime in any of their services".
I ended up going back to S3 because of this bug, unlimited egress (while sweet) is not really a selling point for my particular use case.