Interesting, after reading your comment I've decided bad UI is subjective. I'm gen z, and never found Snapchat's UI to be confusing, and none of my gen z friends have ever complained about it, either.

> They flock to difficult to use interfaces that become an insider feature for young folks to keep their parents out.

This part might be true on a subconscious level (or it might be part of Snapchat's design philosophy), but do you think younger generations really choose apps for this reason on purpose?