Ex-private school parent here. TL;DR - private schools have their own problems and it can be an equal trade of good and the bad experiences/issues. Depends on what you want in life.

I sent my elementary-aged kids to private school a few years back. I felt fantastic seeing my kids in an academically rigorous program, with parents who seemed to have similar interests around university prep.

We stuck around for a few years and were able to see the good and bad. We're back in public for highschool.

The good: as expected. Money for extras, tons of fieldtrips, proactive sense of community, mentorship, post-secondary strongly supported and pushed. Traditional academic curriculum (tried and tested, none of this bullshit science experiment the gov't is now pushing).

The bad: Parents are donkeys wherever you go, but I saw worse immature behaviour in the private situation. If your kid has behavioural issues, you can spend the money to make it 'go away' in a private school (they'll never get kicked out because that's a loss of tuition). No meaningful discipline, and parents barking at teachers when it really is a parenting/behavioural matter. Oh the parental bullying was extreme - they are paying customers/consumers, and the schools are highly aware of that.

Teachers are under pressure to make it work, esp when mom and dad donate thousands above tuition. Also, the teachers aren't that much better. Some would say worse in some situations - because schools aren't unionized, they get treated more poorly than in public school, and are sometimes paid less. You get some teachers 'starting out' and biding their time for a spot in the public system, or older, burnt out teachers who don't want to deal with the messiness that poverty and associated dysfunction brings.

So much cronyism. So much nepotism. Competition on steroids around everything - not just academics, but displays of wealth that create class systems within class systems. There were kids who were flailing and flunking in private schools, and the extra support/specialized support really isn't there for them.

I since chilled out enough to see that at the end of the day, it's about parental interaction and pushing. I've got good, smart kids, and I make them better and smarter by giving them support, opportunities, and taking time to be a parent.