When someone builds your house and they are lot of malfunctions things... NOT MY FAULT, build a better house yourself !! LOL so funny
You are comparing a Home, one of the most expensive purchases you will most likely make in your life with a electronic device that costs $300.
Ok, I'll bite. Don't know how it works in La France but here in the States once you sign on the dotted line, it's pretty much a wrap.
Some New homes may come with a warranty that if you run into any issues like bad plumbing or electrical for example, they will have to fix but once you move in and have been living in the home you can't just say I don't really like the color of my walls, or the texture on my mosaic tile or my central air unit is too loud and I want another central air unit. Shit doesn't work like that.
Buying a older home, it's up to you or your real estate agent to hire a home inspector and check out the home you are going to buy. If you buy a used home and 2 months later you run into a major issue, it's on you to hire someone to fix it or fix it yourself.
I think some of you French that come on this site need a class on how to be humble. Remember, the world doesn't revolve around you.