I don't know if its my pc or what but when i use this map all the decals on all vehicles and machinery are blurred.
Viewing post in FS25 Judith Plains, Montana 4X comments
CTRL + SHIFT + ESC , go to the performance tab and see what it says in the upper right corner for GPU.
Basically card probably can't handle this map so you can try lowering your resolution settings or turning ON DLSS/FSR.
This is a 4x map with some custom textures so it can be more demanding than a base game 1x map.