It wasn’t the way images uploaded, it was more that kbin’s image previews absolutely skullfucked the aspect ratio of anything that wasn’t roughly in a 3:4 aspect ratio, making a bunch of deeply touching photos look like goofy funhouse mirrors.

I can only suggest to use mobile app. So far I don’t see any problem with image handling on mobile app. On desktop and mobile browser you might want to use voyager https://vger.app