I want to make a horror map and if you are there you can't break down blocks in survival no matter how long you hit it with any command?
/ gamemode adventure
respectively
/ default game mode adventure
Is it somehow possible without the adventure mode?
No, at least not without any tricks
So you want to be able to place blocks but not dismantle them?
It's best not to bet
With servers you can set that certain people can't mine blocks. So if you want to make your map available to others, that would be an option.
But to prevent this in single player is not possible. If someone wants to play the map, you send them the files and they have to stick to the rule.
And then what speaks against the adventure mode? That's exactly what he is there for.
Just
