This guy blatantly and strategically got himself talked about and you guys call it "insecurity" and "childish".
It is a meme that guy in loud ferrari has a small something but we poor people say it to each other to cope. it is a working mechanism to get noticed by girls and girls will look on that ferrari.
"insecurity" is not it. "childish" is not it.
"poor taste" maybe it. "selfish" maybe it. Try those instead.
That's the thing, mate, this is attractive to a cohort of people but this adolescent view of the world is, well... Rather childish.
I know many women in my adult life who are absolutely put off by a guy flaunting how rich they are, it does attract some others but it isn't this zero-sum game where the rich guy has all the attention and is so much more attractive to everyone.
It's not a cope, I used to think like that when I was young but it's all quite bullshit being force-fed to insecure guys, it's childish to see the world like that since there are so many different types of people that might like/dislike very different stuff.
But good luck, get yourself a Ferrari and go get the girls you want to be attracted by it, I realised that those are really not the girls I'm attracted to in the end :) and that's fine, there's people for almost all tastes.
Just shed away this adolescent worldview, it makes you look pretty insecure and immature.