Pure nonsense. Monerolink only applies to very old transactions that intentionally turned off privacy by setting mixin to zero.

Anonymint is a well known Monero hater. His mathematics knowledge is a joke; just enough to be able to waste the time of Monero's PhD cryptographers. He's been coming up with imaginary vulnerabilities since 2014. They require ridiculous conditions which exist only in his head. For his vulnerabilities to work, an attacker would have to own over 80% of all outputs on the blockchain, and also continue to generate new transactions to maintain that. In other words, they might work if you created your own testnet, but never on Monero's blockchain.

Meanwhile, it's almost certain that Zcash has a deanonymization backdoor, as hinted at by Zooko and Matthew Green. So Zcash is almost certainly a honeypot, with even less privacy than Bitcoin. It's not surprising that they would put out fake news on Monero, as their inferior system can't compete without deception and tricks.