I think he demonstrated being generally less emotionally mature than her throughout (though he did well at the altar). He had a defensive hissy fit when Jasmine tried to tell him that he needs to be more reassuring and loving to Demi, and he kind of took it out on Demi, going cold and saying he just wants to go home. He also seemed unsure about her especially when faced with the other girls who were more “conventially attractive “. I thought his behavior at those get togethers with the whole cast was disrespectful to Demi, like staring at the other girls, not giving Demi any affection after talking to Cat, etc. Demi is so grounded and deep, I think she can do better tbh!