I've got rejected, but something doesn't match

Help Page -> Common Rejection Reasons:

Your submission doesn’t meet our quality requirements

Unfortunately your submission doesn’t meet our current minimum technical quality requirements for the category it was submitted to. Please consider taking some time to familiarize yourself with our current library and quality levels of popular items before resubmitting.

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…unfortunately we found it isn’t at the quality standard required to move forward, and you won’t be able to re-submit this item again.

Is it me, or there’s a contradiction?

By item, you mean the exact package version that got rejected, or the product in general?

That product, in general

It does sound like a contradiction in the language that they use but here is where I think it comes from:

A Soft Rejection only requires small fixes/improvements and you can resubmit again. They probably see this as being the same project.

A Hard Rejection, such as in your case, requires significant changes/improvements before you can resubmit it. And they probably consider this to be a different/new project now.

So, you can resubmit your project but you will need to make significant improvements before doing so.

Ah, I understand now.