> So he has a generalised feeling that Bitcoin is bad because it's popular and has vocal fans, and that regulation is good yet also complicated, so anything which seems simple must be unregulated and therefore bad.

The only (or at least, the main) argument we ever hear in favor of Bitcoin is that it's unregulated, and therefore it's liked by people who dislike regulation. Why, then, is it surprising or illogical for someone to dislike Bitcoin because they're in favor of regulation? Being in favor, or against, regulation is a matter of personal political opinion, and that, in turn, shapes one's opinion of Bitcoin. This argument makes just as much sense as those for Bitcoin.