My dc are state educated (one good, one outstanding) but if money was no object, I’d send them to private school.
My DD’s school was 3 class per year, Ofsted outstanding and everyone raved about it. Oversubscribed so infant class was 30 and junior school 32. It was a large green site with a running track, an onsite swimming pool, a forest school and academics were strong. Problem was behaviour. There were so many kids with really significant SEN that each class had a few whose SEN came with terrible behavioural issues, and the school simply couldn’t manage it. As time went on there was an increasing amount of violence, fighting, misbehaviour and bad language including sexualised language and gesture, in the classroom and on the playground, directed both at the kids and staff. The usual low-level disruption caused misery, and dd NEVER had an IT lesson in year 6 because the class couldn’t be calmed down enough to use the computer room facilities. My dd was sometimes quite frightened - chairs thrown, cupboard doors ripped off, one kid had a broken arm, one got a dislocation, regular classroom evacuations, etc . And “good” kids were forced to sit at tables to dilute “bad” kids’ behaviour. School didn’t like to suspend kids so it went on and on. My dd was bored too, there was not enough academic stretch. She told me that by year 6 she would sit and stare out of the window whilst the teacher drilled the class over and over and over on the SAT content which dd has fully mastered at first attempt, trying to blot out the noise and annoyances, and would daydream about zombies or monsters or murderers breaking into the school and where would she hide, how would she escape.
By the time I appreciated how a few bad eggs in lower school would turn into a nightmare, it felt too late. My invidious choice as parent was either rip my child out of a school she loved (but was quickly learning to resent ) from all her friends and routines in y5/y6, to avoid the behaviours of a significant minority. Or leave her there knowing the risks of being around behaviour like that. We left her there and I regret it.
My ds on the other hand is at a different state primary and it’s only “good” but for him the school is much better since the classes happen to consist of 60 kids who are all fairy lovely and already I can see there is a stronger approach to discipline and making sure parents are brought in early to discuss and correct even very small behaviour issues.
My point is : if your dc is unlucky, state school can be a nightmare even at a “great” school just because one of two kids will not be managed out of the system. And anecdotally that’s becoming more common.
Whereas in a small class at private school there’s far less chance of turning up a behaviour issue that the school cannot or will not address.
Private all the way.