Low resolution texture is blurry on model. Interpolation is set to closest, looks fine on UV grid

Is more or less blurry depending on UV stretch, but still blurry on completely flat UVs.
I’m making a low poly model so want to keep the resolution low

here’s the project file: https://we.tl/t-HRV1Jyd7cd
Any help would be massively appreciated! (:

IDK about the options of ucupaint you seems to use for this … but muting the node…

Ah thank you so much! I had no idea that was what was causing it, guess I will have to deal without using layers haha. Thanks again!