Is there an antonym for "nice-to-have"?

Let's suppose that while looking for a new car, I end up with a list of requirements that I would like my new car to satisfy. I proceed to put these requirements into one of the following categories:

• Must-haves
• Nice-to-haves
• "Not-so-nice-to-haves"
• Deal breakers

Is there a more concise and/or idiomatic word or phrase for "not-so-nice-to-haves"?

drawback

: an objectionable feature : DISADVANTAGE The plan's only drawback is its cost.

https://www.merriam-webster.com/dictionary/drawback

Also demerit, disadvantage, inconvenience, shortcoming, stumbling block, detriment, nuisance

White elephant

In particular this sense:

an object no longer of value to its owner but of value to others

If it's a feature designed into a car, it's of value to the manufacturer and other potential buyers, irrespective of how you value it.