The way that defamation suits are run is that you have to provable financial damage, which means opening the books, which is a risky move if you also have people seeking to destroy your life....and since Kiwi Farms isn't really a profitable business, it won't go anywhere.
Anti-SLAPP laws prevent people with unlimited money and power suing people who really can't defend themselves for defamation successfully but it doesn't work in reverse, so a newspaper could print 100% bullshit, and even if you could go after them, they'd lawyer up and claim that they meant no actual malice and weasel out of it, though by that time they'd probably just pay you to go away. And even then that would hinge on if they put in statements that were unverifiable. How Sandmann (Covington High School kid) had some measure of winning was that the press put in statements that he "blocked" Nathan Phillips "would not allow him to retreat".
Beyond that, defamation is basically bread and circuses, like Johnny Depp vs. Amber Heard. Extremely expensive, doesn't really restore reputations or fortunes (especially if the person can't pay), and reveals dirty laundry about both parties.