i’m just going to guess that it has nothing to do with object storage configuration. i think your avatars are slow across all four of those setups because your bottleneck isn’t the storage provider; but rather it’s the network latency between your site droplet and your bucket, or your server’s CPU is struggling to resize the images on the fly. i don’t know anything about your server/CDN configuration and what distances are involved here. but i think once the edge cache is built, it shouldn’t matter what storage you use as long as you stick with one and let the cache build itself. however i’m just theorizing at this point because i have no other ideas. 
