For fun I did a quick check and based on GEBCO elevation data this looks like about 20m sea rise (I’m guessing exactly – I assume whoever made the image picked a round number).
I could have posted what 2m looks like but at this scale it just looks like current Florida.
Are you aware of Redlib? Self-hostable frontend for Reddit aimed at privacy. I’ve never had a problem with old.reddit but Redlib has a bit of a more modern UI if that’s what you’re after. There are a bunch of public instances if you don’t want to host it.
Otherwise I’m sure you could use uMatrix to disable the tracking (can’t give detailed instructions sorry), but I’d argue hitting Reddit’s domain at all is already less than ideal if you’re trying not to be tracked.