When I visit various websites in Germany, I have a ping of 100-200ms due to the Cloudflare proxy.
If I visit the sites without a reverse proxy, I have a ping of 10-15ms.
The problem is global, I have asked a few people and their performance suffers too.
According to Cloudflare cdn-cgi/trace I am not routed via Germany but via countries hundreds/thousands of kilometers away.
For example, I am routed via IAB (North America / Ashburn).
A colleague is routed via EWR (North America / Newark).
Other sites hosted in Frankfurt am Main are also significantly slower with the redirection via North America.