Can´t figure out what´s this.

Ph.. I'm leaning towards just because it's presenting on so much of the plant. The next culprit would be a micro deficiency but your plant isn't really huge so that's less likely in my opinion. I'd definitely get a ph and ec from your soil and go from there. I have this idea that a lot of issues present in soil because people buffer down the water they use.. when the soil is already acidic to begin with so really should be using just regular old tap water with a ph of around 7. So many opinions and ideas someone will probably be like I don't do that.. But Iv'e grown a few plants in soil and been amazed at how little you can actually feed and how easy it can be.. It's why I choose to grow in soil .. Because it's easy.