What can be the problem? BIO BIZZ ALL MIX, Biobizz fish mix, top max, bloom, heaven, algamic, acti vera as per schedule. No ph water, no ca mg added ever. Added guanokalong at the beginning as well.
Likely the pot isn't big enough to support the microbial life, enzymes, needed in an organic grow. As for the leaf damage, it looks like Thrip damage, but a closeup of the damage on the leaf, or scouting that found bugs would be needed. This can be avoided by incorporating something called "pest management" into your grow. Think of it as like prevention. Better to prevent than to treat.