What is the purpose you want to repaint a newly painted wall?

In term of durability, all internal emulsion paint is more or less the same. It is normal that masking tape can peel off the paint if leave it there after some time.
In term of easiness to clean, then you might want to look at those "easy clean paint" such as Nippon Easy Wash.

Peel off to what extend? Can see the wall become patchy?

This seems a bit bad to me. Probably they have mixed cc powder to the paint they use.

You can find at hardware shop.

You try to use hand to swipe the wall and see whether it is powdery? If yes, then confirm mix with cc powder already.

Is you are comparing the same grade of paint, there is not much different between ICI and Nippon.

You can have a look at off white series. There are many variants of white colour.

Ya, Jotun is about the same too.
Colour wise, very subjective. But anyhow, off white would not give you a huge different no matter which you go for.

ICI, Kansai, Jotun and Nippon all about the same.
SKK a tad lower grade.

Jotun is even better at powder coating.
But to be frank, just do not get those back yard paint, the rest shall do fine la.

Got many back yard 1. You go to those small super market can find many.

Because the colour pigment is not that stable.

Not sure.