I think Mr. Seif's answer is completely right.
However, you have written that you need the translation of the whole sentence. It is as follows:

Because of course some people absolutely smashed it, you know turned up prepared, knocked the socks off their new teams and this set them on a smooth course throughout their career
چون بعضی‌ها واقعاً موفق بودند، یعنی با آمادگی کامل حاضر می‌شدند، از هم‌تیمی‌های جدیدشان جلو می‌زدند و این موضوع باعث می‌شد که به طور کلی در مسیر شغلی همواری قرار بگیرند.

Smash it: to be successful
https://www.urbandictionary.com/define.php?term=Smash it

knock the socks off (someone or something): to completely outclass, outdo, or outperform someone or something; to soundly defeat or best someone or something.
https://idioms.thefreedictionary.com/knock socks off