No one has answered the poster’s question about teachers above. Good teachers will always out and there will be a scramble for those schools by those that know. It will always be unequal. Those that can scramble quicker will get there first. That’s life. We’re not going to sack anyone with great results because it’s not fair on the others, child or teacher.
If education is important to you, and it isn’t to all, you start doing what you can when your children are tiny. You have fewer children so you can afford the best. That’s your choice. You move, you find friends with bright kids, you do projects, you go to museums and do educational things on the weekend and fill your house with books. It’s a full time job navigating your child’s educational upbringing.
Some live for for football, some for family life, some don’t have interests at all. Education is just one aspect but yes, one that many think is the most important.
My child attends one of the best private schools in London. We saved his school fees before we had him. Why would you not if you are unsure about the other schools in your area? And if you can’t (we both worked full time and put off having a child for many years) then you need to move to an area with better schools.
You can’t drag the others down because you want the best and aren’t, or your children aren’t, prepared to make sacrifices.