Years ago I used Backblaze and it twice "lost" my entire backup with their support staff shrugging and suggesting I start it again. At that point I didn't have fibre so a full backup was weeks if not months. Needly to say I opted out of their service. I am not overly surprised that this is not a solved problem.
Yeah, it's clear it has bugs and doesn't work well. rclone to B2 works fine for me. And I tested with Cloudflare R2 and can switch to it if BB goes under.
R2 was slower than B2, in my tests. I think it's slightly more expensive, too, but not much IIRC.
