Re: "Twitter [...] have broken GDPR rules"
Similar to the typical Brexiteer view of the EU, then: An oversimplified, distorted view which they can use to justify their own opinions while denying the validity of anything else to make themselves feel better.
Personally, I don't use the caricature to avoid engaging on any issue. With those willing to have a reasoned debate I will discuss the merits and flaws of the EU until the cows come home. Those who are not willing to do so, who dismiss my points out of hand, who cite proven lies as fact and refuse to accept correction... After a short time of trying to convince them, I'll treat them as the caricature they are acting as.