I think https://i.reddit.com is "more text-only" even though it does have icons and some thumbnails.

The old mobile interface is entirely text, it removes the thumbnails present in the i. subdomain (also available with a trailing /.compact) -- the fact that there are so many different interfaces is a little baffling to me, but the text-only version is the only one I can stand to read: https://www.reddit.com/r/apljk/.mobile

The site lists:

http://www.jimmyr.com/

which might be it.

gopher://gopherddit.com