Sound reasons for excluding a reviewer
You should list reviewers (if any) that you think may be unfairly biased towards your science in some specific way. this includes persons with whom there may be a personal conflict that would shadow an objective review or people who have shown an unmitigated dislike for your science or the like. It is not intended to be used to list persons just because they may not agree with your science. In the specific case you list, I can see that such a reviewer may be unwanted but I do not think the reasons are strong enough to warrant signalling the reviewer as unwanted. The chances of the reviewer being asked may be small if there are many others that can be considered useful. Finally, if you were still to receive a review that is as unclear as the one you describe, you should ask the editor to clarify what you should read out from the review. After all, the editor must have read the review and used it to evaluate the degree of revisions necessary of your manuscript. So in short, you should save the nasty for listing as unwanted or non-preferred (whatever the journal terminology may be) reviewer.