The privacy shield was 'shot down' because it would allow the US unprecedented access to personal data of EU civilians (including unlimited surveillance).
GDPR is not that bad. It has downsides but it is not overly complex.
Companies (including cloud services) have to comply if they want to have business in Europe.
Fines by EU: Meta: 1.5 billion Amazon: 750 million TikTok: 350 million Clearview: 30 million Apple: 1.5 billion