Support them how?
Tbh since moving down to the SW I am reminded precisely why they are all in decline in the first place. They make it costly and time consuming to get to the beach, and offer outdated tacky experiences around the beach if you have to endurance to get to it. The beach you get to is then often entirely free of facilities, unless over priced over cooked unimaginative sea food, crap fish and chips, or endless options to purchase uninspiring pasties is of interest. If you are a nature lover, these places are pointless. If you are a foodie these places are pointless. If you like shopping for anything not beach related or made of plastic, these places are pointless.
Since I'm not a Pasty Stuffer (a pejorative I use for people who turn up miserable, with hyperactive children who have never been outside before, get sunburned and go home again to the Midlands) there is no appeal.
Exmouth, Looe, Torquay, I am talkjng to you.
I'm not going to be able to help them unless they help themselves.
Oddly, the places that are worth a visit often don't have a beach of note. e.g Falmouth, Totnes, Dartmouth.
(Vast sweeping statements, but with a ln element of truth)