In my opinion it would be better that bad places are only able to employ bad teacher

What we need then is an open forum that helps teachers make informed decisions. Even then teachers should be 'able' to work for whom ever they choose. I know several talented bright young teachers who actively choose to work in difficult/low performing inner city schools in the UK.

after complaints from concerned parents then their Ministries of Education will have to act to close the Training Centres in favour of regulated State Schools.

Ask yourself why do training centres exist in the first place? I'd say there are two main reasons
1. They offer something that the public education system doesn't or even can't offer
2. Parents/students want to get ahead in their studies

So long as that niche and the demand for it exists there will always be training centres. If parents aren't happy then they can take their money elsewhere or opt out of the private education system altogether. One of the key regulating factors within private education is market force.