Looks like bug damage to me but the pictures blurry to distinguish from what pest. By your description and what I can see it would be either spider mites or thrips. Look under the leaves(where pests live to hide) and see if u can see tiny bugs. Spider mites will usually look like little black dots to the naked eye. Thrips will look almost like tiny whiteish translucent worms. Depending on the species of thrips they can range in color a bit. Also look a touch different at different stages of life. Happy growing and stay lit fam.