When I see those kind of leaf deformities it tells me many things are going wrong, so it would take one lots of time to explain it in detail which is beyond the scope of a forum setting, but here is what I think you need to fix.
The plants roots are not getting enough oxygen. Then partly due to the lack of oxygen issue the plants roots are staying to wet for extended periods of time. Which means you ultimately have a aerating problem. All plants need water, but when we water we really only want the roots to get that water, and then give the rest of that water a way to easily drain out of the pots they are in. Yes, we also want are soil / medium to have some water retention, but when you don't create a good environmental balance between those two things, problems will happen. Like in your case, the plants living environment has way to much water retention, which causes the roots to constantly get to much water and not enough air, which will create wide node spaced plants, (even if the plant is getting adequate lighting), that won't be able to create enough fan leaves to generate enough of a photosynthesis response to generate enough of a chemical response to build a healthy root system, which then limits the plants ability to build healthy fan leaves, etc, etc...