What to do if someone asks for your help with problem X, but then you figure out they originally tried to fix problem A and recursively came up with bad solutions until they got at X at which point the entire codebase overlaps responsibilities, implementations leak, concrete instances are created in controllers ignoring DI and you just can't say ANYTHING nice about it?

Also does not follow a methodology and just does whatever, thinks singletonning a database context is a good option because stuff isn't saved, says they will 'refactor later' even though it should have been done last week and just doesn't seem to get it?

I've told them that what they're doing is plain wrong and they're making it harder for themselves than it needs to be, but they just seem to not get it, even though at this point basic stuff like that shouldn't be an issue.

Posted this in rant since it became kind of a rant instead of a question