Unhealthy is unhealthy
9 letter word count is very odd. Overuse of the word carries detrimental effects such as eye rolling, anger, nicememe etc. The word reads and sounds unhealthy. By reflexive property of mathemagics, unhealthy = unhealthy.
For people who use this word, they don't even consider healthier alternatives such as injurious, deleterious, insalubrious, or malignant. Literally unplayable!
I am actually glad that this word is just an unimaginative negation of the word healthy, or else it might just have a positive connotation.