The first one looks like it has far too little sun or has begun to rot from overwatering, the last one looks like it's about to show signs of overwatering.
How to make better?
Water less or put up in a sunnier place.
Check the soil, if it's something rick of well-decayed organic matter (humus and such) or if it has maggots down there nom nomming away at those roots... yea, change it.
Coconut compost works well too for these if you don't want to go with sand/grit/peat compost combo, just something that drains well. No damp soil for two days in a row from just one watering should happen, that's the easiest way to get elongated internodes (the space between the leaves gets larger).
But faint leaves usually means not enough sunlight.
Would help immensely if you could tell us what soil that is and what light conditions it was in so far, because so far that's just a little guess from a hobbyist.
Anyways, I would immediately repot it into more loose soil and water a bit less, definitely not water at all the first half or full week after repotting. Also I'd scrape off some if not all old soil to look for parasites, after that put it up in a shady spot for until the first watering, after which it would get a south facing window with 7+ hours of daily full sun.
