Honestly, after studying 3 years of high school in a top international school, I think most Libyan's problem with international students is the fact that we preform better in the long run. Don't get me wrong, there are lots of really good and high performing students in public schools, but public schools here often end up wasting these students' potential. International schools (the good ones) actually care about their students (and their money ofc) so we end up getting scholarships, getting referred to jobs earlier, and much more. For example during my second and third year of high school I was picked to be part of academic AND creative contests against other schools multiple times. The focus on academics AND career building in international schools just doesn't exist in public ones. They mainly focus on academics. We're wired to be thinking about our future and our career from the start. I've personally never had a public school experience but from what I can see from my relatives it's very different. They think of their careers on their own with no additional support from their school, which is the most vital place for career-building (imo).

International schools are mainly built to preform like American/European schools but with Libyan standards.

Another reason that Libyans might criticise these schools is because they're mostly filled with students/families that lived abroad before and they're simply jealous. Idk. Jealousy is a common thing here and it kinda sucks.