It doesn't help that the non-security aspects of Signal are garbage. I have several years of data in my phone that I want to backup, but it's a painful process because Ihave to export every media file manually and then transfer it over to an SD card. My phone is low on internal storage space, but Signal won't let you choose where exported media get saved to, so I have to play Towers of Hanoi shuttling media files in and out of my limited vacant space and then deleting them in Signal after they've been safely copied to the SD card.

The app is full of tiny annoyances like this. For sending photos there are some editing/cropping tools - a fun and somewhat useful innovation, but while the crop handles work from the corners of an image they don't work properly from the sides. I was a busy evangelist for the product in its early days, now I hate using it.