looks like you have a potassium deficiency, add some potassium. If that doesnt help then i think your soil is too compact i cant really get a good look at it but it looks very dense which and doesnt have very good drainage, that can suffocate the roots which might have also over nuted them, because of the absence of the perlite of soil in the final soil mixture, the nutrients will be more concentrated. the perlite delimits the concentration of nutrients as well as providing drainage.
in essence yes some of those pictures had nute burned plants, you might have other things to check though.