This is complete conjecture. Like Truecrypt, Veracrypt is open source, has been audited and has been actively maintained. Could it use another audit? Sure but so could Bitlocker but that isn't happening for even the first time any time soon.
Never heard of any credible reasons to distrust Veracrypt. Don't know who these "people" are either, none of the comments named anything more concrete than what sounds like online rumors.
Veracrypt is a curiousity, not beloved the way truecrypt was.
I’d love to see hard numbers for this, just my outside impression.
In fact, when trying to find old forums that I was part of during that era, I failed; and found only this: https://discuss.privacyguides.net/t/why-people-still-believe...