The runout on my cordless drill is huge, so if yours is the same that will make things appear worse.

I recieved a noisy ballscrew which had about 0.5mm run out (measured with it bolted properly to the machine and driven by a stepper motor through a coupling).

I considered returning it but they are packed in carboard boxes so chances are it would be no better if they sent another one.

So I sent it off to a UK company and they straightened it to a claimed <0.05mm run out. Cost £45. After that it ran very smoothly and quietly.