Performant is problematic because it's tech jargon that is only now gaining grudging acceptance as a word in the overall population.

It's not wrong, but it's best avoided if you want to avoid pedants waving their King's English stick at you.

FYI “problematic” is also a vague and essentially meaningless term that is no more specific than “bad.”

English has lots of words that mean mostly the same thing. Do you seethe at every entry in a thesaurus? How does one determine which word is blessed by the higher minded beings you choose to exclusively associate with?

I don’t usually seethe, it’s more like remote embarrassment. I think there is a German word for that. I often recommend a “non-hire” as well.

Edit: I changed “non hire” to “non-hire” because I have no personal issue with acknowledging my usage of improper punctuation. Why should it be controversial to point out usage of improper vocabulary in others?

FYI, non-hire is the type of phrase that should be hyphenated.

Problematic is just fine, brah-- with usage dating to the late 17th century and with a pretty clear connotation of "presenting numerous problems" instead of just being undesirable/bad.

I suggest "performy" and "problemy" as shorter. (Although many people seem to think length a virtue in words) And instead of "more performant" – "performore"?!

Take it up with the people who coined problematic 4 centuries ago.

Seems like a very proactive development