The phrase "kill your darlings" circulates in fiction writing schools. The reasoning is that a "darling" turn of phrase which the author really likes is likely something that they are irrationally obsessed over and that distorts the editing process around itself, to the detriment of overall quality.

Like a lot of writing advice this is really subjective.

I'm not who you're replying to, but I agree with them. For my taste, it's a little too clever. It distracts from the subject of the text and instead draws attention to the form of the text itself and its author.

Worse than that, it's clunky-sounding and trips me up verbally.

That's subjective, of course, but I would have preferred if the author had left out this turn of phrase.