Indeed. A simple example is photo-sharing, a critical function for many people.
Every time you send you have to manually choose if you want higher quality over smaller size. You can't set a default option.
You can crop crop photos, but the crop handles don't work properly and often spring back if you only want to crop in one dimension.
There's an anti-pattern where there's a separate tool selection and tool edit UI on the screen at the same time, so if you are in a hurry and hit 'Save' without hitting 'done' (immediately above it) your changes are discarded.
But if you hit the discard button, you have to confirm it in a modal dialog. It's faster to discard changes by hitting 'save'.
There are pen and highlighter tools so you can draw on an image. but no shape tools, in case you wanted to blank out someone's face.
There's a text tool with some display options. But it's always in the middle of the image. You can move it around, but only after you have typed the text. You can pick color but you can't change the font. It's faster to make a meme online.
You can't use any text effects like italic, bold, or underline either.
Remember how there were going to be blurring tools built in so you could blur faces if you were an activist or journalist? Offered in Beta, never made it to production.
Well, you could just put a sticker over their face, using one of Signal's (extremely cringey) stickers, or by uploading your own. But you can't paste an emoji.
On desktop, you can drag a sticker over the photo with the mouse, and it gets a little '+' in a box to show you're copying the sticker. Then it disappears. Why? Because it was designed for a touch UI and only clicking on a sticker will actually add it.
These are just the problems with image handling/markup. I could make many more lists for other aspects of the app. The markup tools would be kind of superfluous, but it is useful to be able to do thm within the app...only they're implemented in a way that is a source of constant frustration.
If you bring this up with them on Twitter or so people will rush to say 'well Signal is for secure messaging, use an art program if you want fancy image editing lol.' The same people who rush to defend Stories and stickers as 'broadening appeal' while simultaneously saying 'nobody uses SMS anyway' even though SMS is ubiquitous in Signal's home market. It has degenerated into fanboyism at this point.