Are you serious? It's a very simple thread-based design. Threads are separated by approptiate dividers or whitespace or indentation. I don't get it.
It’s infuriating me to even try to explain the problem to someone who doesn’t see it.
For example, can you explain to me - without going to try it out first - where exactly to tap (on a phone) to view the comments on a picture post in your home feed?
Been on since 2009, follow/followed by a few hundred people, use reddit since 2006, blahblah. Reddit isn't great either but I find it a lot less confusing to read on a day-to-day basis. At least old reddit...new reddit is quite confusing IMO in many of the same ways twitter is.
If I had to guess I would vote with other commenters here who are saying that the UX is likely on purpose, and has been built with metrics in mind and not user comprehension.