First off, the Article 13 in question was already rejected once by Parliament and is expected to be repealed against (but it doesn’t hurt to be cautious, good on Mozilla).
> GDPR
While not uncontroversial, GDPR is generally seen as a good thing by experts.
> arresting people who train their dog to do a bellamy salute
This didn’t happen. The man was arrested for hate speech, not for gestures his dog made. It’s also unrelated to EU law.
> arresting people for having potato peelers in public
This didn’t happen. The man was arrested for wielding a weapon in public. This weapon happened to be a knife (but not a potato peeler, though it was called that by the press: it had a fixed > 3″ long blade) but the nature of the weapon is secondary; what’s relevant for the arrest was the fact that the man wielded it as a weapon. And, again, this has nothing to do with EU legislation. And some additional context: the knife wielding laws in the UK are indeed pretty draconian but the UK, which is generally pretty low on violent crimes, has a specific problem with knife crimes and is therefore tackling the problem heads-on. Seems reasonable.
> I can't think of a single reason other than vacation days that I'd ever want to live there.
Really? https://www.numbeo.com/quality-of-life/rankings_by_country.j...
(In fact, even with occasional questionable laws being passed on EU levels the legal situation in the EU, both on EU and on country level, is still a lot saner than e.g. in the US.)