Any project had its own lowers and haters. In this case, you know this guy and this is directly against you as a person, not just to your project. I think you don't need to care if it's a false accusation especially when it coming from a newbie user without any reputation history. No one will care if he talks nonsense.

You also need to know, as one looks at forced negative comments, expect false-positive comments to be treated equally.
I checked your [ANN] Denex | The Decentralized NFT Exchange and there I see most of the falsely glorified posts, half of them need to be reported as spam. Do you use paid bump service, or you just post from your alt accounts there?