I went to school in Scotland, but my children (aged between 7and 14) go to school in Slovenia (normal, state run school not private/international school). There are plenty of differences, pluses and minuses of both systems.
I don't think education is perfect anywhere right now - the world has changed so much in the last few decades and I don't think any of us really know what sort of future the next couple of generations are going to be dealing with.
The massive difference school in Slovenia is that compared to the UK, private education is not really a thing (there are some international schools, but mostly used by foreigners who travel a lot) and education is standardized across the country, so all children regardless of what area they live in, or how money their parents earn, experience basically the same educational opportunities.
Here, children don't start until the September after their 6th birthday (or are very nearly 6 - the youngest children in the year start aged 5 years and 9 months) and they don't start learning to read and write until after new year in 1st grade, when they are all 6 (or nearly 7) and it seems to go really easily - I would say from what I've seen, average 7/8 year olds here read and write at the same level (or higher) as average 7/8 year olds in the UK, just spent a lot less time learning how to do it.
Language teaching is good. They all start learning English in 1st grade, by around 5th grade (age 10) most are completely fluent. From 4th or 5th grade they have the option to learn more languages.
They all do a cycling proficiency test, during school hours, at the start of 5th grade (age 9 or 10) and then get given a bike license. After that they are allowed to cycle to school on their own - and bike is how they take themselves to all activities/sports training /meeting friends /going to birth parties etc etc from that age onwards. Because most of them do it, it's normal (some parents insist on driving them everywhere, but that's a new thing).
There is kindergarten available 5 days a week from 1 year old to 6 years old, but it is optional, and payment is means tested, so you only pay if you can genuinely afford to. Most children go from around age 3 or 4, some go younger, some don't go at all, it depends on the family. It makes it a lot easier for all parents to return to work.
What I don't like... They get masses of homework, a lot of it just rote learning. There is a lot of pressure on grades from 3rd grade onwards, some parents (and consequently kids) get really stressed if they don't get top marks. A lot of life skills (being kind, being independent) are not noticed at all. If children need extra help, it is up to parents to do it at home or find and pay for extra tuition outside of school.
The school day starts very early - some days at 730, some days 8.15. It's fine when they are little but gets harder when they are teenagers - especially for high school (aged 15/16 onwards) as most high school classes seem to start around 7.30 and if you have to travel to get there it gets very hard for some of them to get enough sleep, especially as they are expected to work/study a lot in the evenings.
They finish around 12 or 1pm though, so another positive thing at primary school (which goes til 9th grade, aged 15) is that there is lots time after school for unstructured play or sports/music training every day.