It seems that the seller must have given you a bad review out of "revenge". In Taobao, the seller is sometimes really helpless, as you said, because he didn't apply for a refund or anything, but gave a bad review directly, which is definitely unacceptable as a seller, because it is just to earn credibility.

But as you said, if the goods are out of stock, you don't mark the statement in advance, but you still ignore it, and your attitude is really bad. It is also appropriate to give such sellers bad reviews. It doesn't matter if the buyer has a bad review, it's generally useless. It's just a mutual evaluation model of Taobao.