Yes, don’t give up on it. After a holiday 2 summers ago, I came back to a totally leafless frazzled blueberry in a pot. I pruned back the crispiest stems and gave it lots of water through the autumn. Then in spring I mulched it with well rotted manure and gave it an ericaceous feed (slow-release granules). It had loads of new shoots last year and a few berries. This year it was super-productive. Good luck with yours.