Just trying to get some advice on what this is tried finding some other pictures of it and none of them quite match so hard to diagnose. Well for me it is lol
the first picture has the same problem as the rest no bugs although it does look like it but there actually little holes almost look like little burn marks
The 2nd/3rd pic look like a pH induced cal/mag deficiency to me... I'm guessing your growing in fox farms ocean forest or another heavily peat based medium? Try adding 3 tablespoons of garden lime and see if that helps your problem! DEFINITELY not a potassium deficiency like previously stated! Those problem solving charts that have all the pictures of leaves seem to mislead a lot of people.