>>Sometimes it seems like the ones who don't improve have more tenacity than the ones who gain skills. Do you think it stays more enjoyable for the ones that don't seem to notice the stagnancy?

I'm not sure I understand what you are asking. Are you saying that people are happier in their incompetence and so appear to keep soldiering on than those who strive to better themselves? Whereas in reality it's just because they are blissfully unaware of how poor they are?

Perhaps the ones who are improving move away (or are driven away?) to new pastures to avoid the boredom of stagnation?

Does it mean that the dull will inherit the earth?