Why don't website functions work in the Safari browser?

I sometimes try to edit from my phone or ipad on the Safari browser and many features do not work properly or at all. Uploading an image is challenging because I can never just scroll down to the blue “upload” button, I always have to sit there for a minute trying to scroll down but it does not move, it only moves the layer behind the message box. Sometimes I can flip my phone to the landscape position to get it, but even that is not always successful, nor can I just zoom out to be able to reach the button. It is also unsupported with editing inside of the actual campaign. Please update and make it more Safari user friendly. It is not at all right now.