This sadly excludes the majority of bad UX decisions that are done entirely to maximize users time inside of the app as well as display advertising.

So many functional apps are destroyed by these incentives. There is literally a "skill issue" but in the opposite direction. The design is either purposely malicious in a subtle way with "dark patterns" (something Amazon is insanely guilty of. Literally just go try and return and item.) or is purposely annoying trying to ensure the user purchases the "free trial" to actually make the app functional. Knowing a lot of users will be charged at least once for the free trial.

I guess my point is that there is so so so so much wrong with UX design today. But for the majority of people that's not because of a bad programmer with no design knowledge. It's on purpose in most cases.