WAS HE WRONG TO MENTION HIS EX AND WHAT WERE HIS INTENTIONS?

hi y'all! so I met this guy, we'll call him D, when I first met him online we clicked instantly and had so much in common down to core values, talked on the phone for hours and meshed really well. at some point cus it was somewhat relevant to the convo I asked why his last relationship ended (after he brought his ex up first which i hate) and he was like "she was pretty, had a really good job, had like $500k saved up (probably daddy's money lol), so any person in their right mind wouldve stayed w her but she wasn't a christian and we got into fights over that so we ended" was he wrong to talk up his ex? was it rude of him to tell me about her like that and talk her up or am i being too sensitive? also, he did ask me to go out to dinner but I already had plans with my friend to go to so he ended up inviting me over instead for movies, we obviously had sex which he initiated cuddled to sleep etc I want to believe he's a good guy and he didn't kiss me bye we hugged then I went home this am and he texted me a selfie of his haircut cus he got one after we parted ways and has been talking to me not nearly as much as normal today although when he was on leave before him and I met in person he was busy once and slow to respond but he is responding and I don't know he talked about dating me before we had sex and something feels slightly off but I am also very paranoid of guys who just want one thing cus I've been there I've also had great relationships begin from just sex so I want to get a feel on this.
WAS HE WRONG TO MENTION HIS EX AND WHAT WERE HIS INTENTIONS?
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