The godawans. They don't always have to be nightmares to thread with. Normally when people think of godawans, they think of either a padawan-level character that act way beyond their actual level power or otherwise are too arrogant to acknowledge that they can fail, or make mistakes. But that description doesn't capture the whole godawan picture as it only captures one possible way godawans come about, even though it is the most common. That said, there are three common causes for godawans:
1. Bad writers. Often players that write what I call "type-1 godawans" have no idea as to what to expect from a padawan-level character, power-wise. As a result, they would oftentimes be acting beyond their actual power level. But at other times, even if they did understand the implications of padawan-level power, they would be too arrogant to admit their own mistakes, losses or failures. Or also when their sense of entitlement is out of proportion with their actual abilities. That is, when they feel they deserve almost everything based on their inner cleverness, hard work, etc. On the masters' side, they are unpleasant to have for padawans, precisely for the reasons outlined above. They are, as a result, way more unpleasant to play with than the other two types outlined below.
2. Masters who wait too long to knight their apprentices. Here I call them "type-2 godawans". Sometimes one's master has real-world extenuating circumstances and at others, one's master asks for too much before knighting their apprentices. In these situations, the godawan's writer keeps using and developing their Force-powers in their master's absence, or in accordance to their wishes, respectively, to the point where such a godawan have a lot more character development than is typical for knighthood, and have a level of power that is consistent with knights with similar post counts [as FUs]. Rarely will they wait so long as to reach a master-level of power, however. For this reason it can happen even with the best writers. Type-2 godawans tend to have higher post counts as FUs than type-1, or even sometimes type-3, godawans.
3. Characters that developed an elite-level NFU skill as NFUs prior to developing their latent Force-sensitivity. By definition that sort of godawan characters, known here as "type-3 godawans" will have had an active NFU life as a Chaos character (in most cases as a PC), sometimes substantial, and godawan accusations can be filed against that sort of character in relation to a skill that does not require the Force to use but where usage of the Force can help nonetheless. As with type-2 godawans, it can also occur even with good writers, knowing that, because in Chaos' era, Force-cults can recruit entry-level followers of all ages, it enables the possibility of writing the development of an elite-level NFU skill and then realize that they were latent Force-sensitives, possibly even through said skill.
Note that godawan types are not mutually exclusive, so it is entirely possible that a godawan becomes arrogant because they have developed an elite-level NFU skill prior to unlocking their latent Force-sensitivity, or because their masters held back their padawans because the padawans couldn't write that well.