Twitter and the new Reddit aren't in the same category. Twitter is still somewhat usable.
Reddit, on the other hand, is an absolute clusterfuck from layout and usability perspective. The choices made were not made for monetary gain, they are simply really bad design choices that for one reason or another have not been fixed.
Aah, the Reddit redesign. I still can't use it. I check up on it once in a while, but my 7 year old MacBook Pro still don't like it. It remains slow, regardless of the number of times Reddit claims of have improved the speed.
On the phone it's even worse, a large number of subreddit now require that you use the app... unless you just go to old.reddit.com.
The point of the reddit redesign still alludes me. Sure the old design isn't mobile friendly, so I can understand that they would want to fix that. Then again they mainly use the redesign to push the app. And the new design isn't that mobile friendly anyway. Certainly not if you value battery life. Comments are now also hidden by default, which is just weird. But you have infinite scroll, which seems to be the main selling point. I'm not sure I needed that though.
Reddit, on the other hand, is an absolute clusterfuck from layout and usability perspective. The choices made were not made for monetary gain, they are simply really bad design choices that for one reason or another have not been fixed.