Imported Materials/Textures never work?

Hi basically if import/migrate a texture to a different project it doesnt work, if i add a marketplace texture pack to a project it doesnt work. It always shows up as world grid material and I have to do a lot of work to get it working. (sometimes i have to actually go into the material and set the normals textures everything.)

Ive tried it on fresh projects, even installed 4.21 and created an fps project in that then added a texture pack to it.

Only thing that works material wise is if i create the automotive materials project from epic themselves.

Any clues as to wtf is going on? im a novice with materials/textures so all my textures look terrible. even ones that should look good.

Thanks.