While that is true the current state of reddit UX allows them to succeed by virtue of critical mass gained before they went nuts. If you created a new site with that UX you would get nowhere.
The simple truth is people are drawn to websites for what they get out of them.
I recall being turned off by Reddit's UI when I stopped using Digg. The content was so incredible that I learned how to love it. And now they've killed Apollo so my only interaction with it is via Google search results for my problem du jour.
There are actual forums of normies and the most notorious meme factory on the internet is hardly a wonder of UX technology.
We are not on some subreddit for a reason.