Maladaptive perfectionism
Another concept that seems unassailable because it cleverly capitalises on a "negative moral valence" word.
"Negative moral valence words" is just my own phrase to describe words or phrases used to label a construct that carry an implicit judgement that they are inherently "bad things" - in a way that is insidious, and allows the judgement to pass without scrutiny. Examples are:
Catastrophising. This term conjures up a caricature of someone wildly running about screaming "this is all a terrible catastrophy". No-one can deny that such behaviour is undesirable. By using that label for behaviors that do not fit that scenario at all, you are implicitly labelling them as hysterical and irrational.
Boom and bust carries a similar sense of frenetic crazed activity that leads to its own inevitable consequences. There is a nice causal implication is this phrase - that the "boom" inevitably led to the "bust". "Bust and boom" is just not a thing.
Perfectionism. A clever label, because of course everyone knows perfection is impossible, so anyone who subscribes to it is clearly misguided. But you can see how valenced it is by the contexts in which it is used. Nobody ever calls an air traffic controller, engineer, risk assessor, investment banker, doctor, nurse or artist even athlete "perfectionistic", even when they value high standards above all else. We use other words for that, ones without the negative barb, like "rigorous" "careful", "thorough", "attention to detail", "high standards".
If by perfectionism you mean excessively high quality standards that significantly compromise a person's daily functioning or wellbeing (e.g., people who never clean the bathroom because it will take them too long to do it to their own high standard), then say that. Don't caricature.
We have started to recognise the problem with these negatively valenced words in some areas. We no longer talk about nymphomania or frigidity, because we realise they carry a judgement about the level of sexual desire/activity that is appropriate for a woman. But we are blind to them in others.
I'm not so keen on
narcissistic for the same reasons. It conjures up this caricature of complete obsession with one's self image, which is somehow at the root of all that is wrong with the person. Some people use manipulation, deceit or violence to get what they want, some actually want others to suffer. These people may or may not be obsessed with their own self image, my guess is that in most situations there's a simpler explanation: anger, resentement, bitterness, a sense of entitlement, lust for power, or just plain old greed.