Problems baking nomal high to low poly mesh

Hello friends,

I have some problems with baking a high poly mesh on a low poly mesh. I used it all the time to make my objects look more stylized. But I don´t know what happend Everythime I bake the texture, the normal look realy blurred and scaled and the crackes and I will upload the objects maybe some defaults on my SP are wrong.
Hope there ist a solution... have to do that for my uni 😞   
Thanks

OBJs
https://we.tl/t-7ytwqoHm5j