I went to a private school that fits those criteria for a couple of years. It was a scholarship, my family isn’t overly wealthy. Smaller classes, lots of extracurricular activities like diving, golf or skiing and two teachers per lesson. Still it was surprisingly shit. First of all unsurprisingly about 90% of students were insufferable brats that would literally pull the “father will hear about this” card on teachers which unfortunately tended to be effective. Also everything had this elitist vibe about it despite really being not that special. This also goes for the food. It was expensive, prepared by an actual chef and yet it wasn’t anything to write home about. Looked like restaurant food, tasted like cafeteria food. I switched to a public school eventually and the cafeteria food there was on par regarding quality and much more reasonably priced.