Honestly, if you're at all discriminating and want to ensure good-to-best results, just forget about using Amazon... :P
And if you must using Amazon, at least go w/ more tried-and-true, solid solutions, eg. don't rely on chromecasting from your phone.
Can you do an actual, Windoze screen capture instead of taking a pic from whatever camera you used? And probably save it in an uncompressed format -- well, as least something not (significantly) lossy compressed anyway.
However you took that snapshot (and then transferred it for us to see) may...