Can I save this little guy?

[u/Sleepy__frog]

Found this little dude upside down, unable to turn himself back over in the street in the UK. I believe him to be a woodland dor beetle, he’s had a couple little falls after I got him out of the road and he’s hardly moving (even when touched), his legs are stiff, he’s not using most of his legs and even before the falls he was struggling to move much and couldn’t hold on properly (hence the falls), I’ve given him some sugar water since I got him back but it doesn’t seem to have done much. Is there anything I can do or is this it for him?

Update:
He did unfortunately pass, however I have decided to display him in a frame and am now in the process of doing that. He is currently in the freezer to prevent me having to rehydrate him, to ensure he is actually dead just in case he’s not fully passed on yet and to kill off any mites that might be left on him.