The UXD Fail for me would have to be with Instagram. On the explore page, where there is the option to see Instagram’s suggestions of what is suitable for you .
The design fail for me would have to be the top horizontal bar which shows other categories of interest example Beauty and Shopping.
This bar design , in my opinion is a fail. Mainly because of the preview pictures. whenever I’m interested in something that’s in the beauty section, I could never seem to find the preview image that would’ve drawn me to move to that section in the first place.
My suggestion would be to have that image as the first image in that section. I guess that’s it’s that way so that I can waste hours scrolling for this picture, that I can never find (adding more interaction time to Instagram)