For what it is worth what Wikipedia says about the document you mention is not what this comment mentions. Personally I found that comment spreading disinformation.

No country gave guarantees only assurances and it is even highlighted that the US senate would have never voted for it favourably, and thus it never was a treaty.

On the other hand breaking this assurances will guarantee no other country will ever give up their nuclear arsenal, of course a non consolation price for Ukraine. Guarantees in nato which is indeed a treaty and ratified, covering Poland and Latvia and Estonia would be stronger but of course, I would not put all my eggs on it.