> At the time GDP of the Eurozone was comparable to the US' now the US is almost twice as big

No, You're just comparing change in the EUR/USD exchange rate here. In 2007, the euro was at a high point of 1.48, and in 2024 it's at a low of 1.02. Inflation has not been higher in Europe than in the USA over that period.

If we look at GDP at purchasing power parity from 2007 to 2023 we have this:

- European Union: 31,162 → 61,217, +96% (https://data.worldbank.org/indicator/NY.GDP.PCAP.PP.CD?locat...)

- USA: 48,050 → 82,769, +72% (https://data.worldbank.org/indicator/NY.GDP.PCAP.PP.CD?locat...)

Which shows a slight catching-up by the European Union over the period.