Having Trouble With Texture Paint, It's making boxes in my stroke. NEED HELP FAST

Like the title depicts, I’m having trouble with texture paint, and I’m pushed for a deadline. When I glide with my brush, It creates boxes where the texture would be, completely ignoring some faces, however if I zoom in enough this does not happen. Also the textures look much lower res, than they normally would.

If anyone has a suggestion on a better way to texture it, IT WOULD BE GREATLY APPRECIATED