Why do students from public engineering universities kinda hate those from private ones

I might study in a private university next year because of my low grades, but I'm curious about this debate.

I mean I understand that students from public universities feel like the ones from private unis are "buying" their degree and competing with them in the job market even though they usually have less grades. Some of those students can be really good at what they want to study in an engineering cycle( electronics, IT, etc) , they can be actif in clubs and freelancers that make decent money from that skill, but they just aren't good at the theoritical part of it.

We need to consider how hard prepa is for most students and many can't keep up with that workflow, Not to mention that graduating with only "technicien Superieur " title isn't worth it for so many students and will set them up for a life of low wages that will never surpass 700dt.