This is one of the reasons I don’t really believe in being friends with exes. It is not appropriate at all to send pics of your current to your ex.
Why are you talking to this person again?
If you wanted to up the dickitude you could say “Wow - look at all the other people who dumped you too!” but that’s just asking for more drama. Just unfriend this person and never speak to them again.
And I agree with Hari and Nemo - not only is it creepy for the ex, it’s creepy for the current partner too (unless they’re into it, in which case it’s double-creepy for the ex).
Concur with bells on.