I agree that the ending was crap! Why would Eve go from saying "I want to kill her (Vilanelle) with my bare hands" to panicking when she (Eve) stabbed her?!
Also, Eve was going to confront her boss about why she met with Vilanelle in the prison...........but then didn't confront her!
Sorry aelmpvw, it wasn't my intention to spoil anything, but some posters have already mentioned that they'd watched all of the episodes, so there was always a potential for the ending to be discussed.
If I could edit my post to include "SPOLIER ALERT" at the start, I would.