Use old.reddit.com instead of regular reddit.com, RES works just as well with that and you can get various addons to automatically redirect you to old.reddit.com if you happen to click on a reddit.com link in the wild.

On mobile, avoid the "official" app entirely - it's very pretty but is very very clearly focused on showing you as many ads as possible. Apollo is my pick for iOS and Relay is fairly comparable on Android.