Repainted wall is peeling
Looks like there's something causing damp on the walls - which is most likely why the old paint was peeling in the first place.

Ideally you need to track down what's causing this in the first place (take it from me these things don't just get better on their own!) - if you can't track this down though or the issue isn't something that is going to get worse or cause other problems you could try coating the wall with some damp sealant paint and re-painting over that.