Morag goes on and on about BE MORE CONFIDENT, goes on about the buff gym guys she fancies, tells him she hates his clothes, doesn't fancy him etc.
Then she hands him a jar and the first compliment is that he is "enough". Not exactly glowing praise in itself, but then she says "I know I keep going on about my type and the guys at the gym, but I realise that's just superficial, and that the way you treat me is more important." I.e. not reassuring him, just reaffirming him that she doesn't fancy his looks.
She could have said, "I shouldn't even worry about types, as being an awesome person is way more sexy and definitely makes someone more and more attractive." But no.
Then she makes him dress as a fireman while getting shitfaced and screaming like a psycho at him; suddenly she fancies him and he's good enough for a shag; but she'll wonder again tomorrow why he feels self-conscious and nervous around her.
She's mad.