It's not overblown criticism. They advertise their product as GDPR-compliant, and yet their website uses dark patterns to trick people into allowing tracking, and is not GDPR-compliant.

Do I trust them to be as diligent in their product?

And yeah, what gives GDPR bad rep is exactly these kinds of dark patterns and other forms of malicious compliance by non-caring companies.

Incorrect implementations give GDPR a bad reputation, though there are worse ones.

Either we have regulation and call people out when they don't follow it and hopefully eventually fine them, or we can just skip it all together.