>>3867720Instagram was designed to share phone snapshits with your friends.
There is no desktop support because it only being on your phone was part of the shtik when it came out. (It was even iphone exclusive in the beginning).
Everything is low res because the images are all displayed on phone screens and storage costs money.
There is no data because they expected you to share pictures you took with your phone and 99% of users don't care.