This in no way absolves their god awful mobile experience but if you're logged into Reddit with the new UI turned off or use the Old Reddit Redirect add-on it's basically as if nothing on Reddit changed since 2011.
I mean there's not nothing you can do. You can still grab the source to old Reddit and it's just a matter of gluing the old UI to the new API like all the 3rd party clients do.
Not trivial by any means but there's a lot of prior art floating around you could pull from.
Sure they could pull API access and be more hostile to scrapers but that's the current escape hatch for people who would have left because of the redesign.
Their mobile website works fine for me, or at least the annoyances are a blessing because I spend less time on it. The one thing I do notice is if you follow a link out of reddit then go back, it shows an error instead of the thread and you have to reload, which loses your place.