Two of their 3 datacenters are located in Germany, which has some of the worst carbon emissions in Europe due to their stubborn refusal of nuclear and reliance on coal/gas. As I write this, we're talking 20x higher carbon intensity compared to France or the Nordics (https://app.electricitymaps.com/).
Besides carbon, coal-related air pollution is responsible for dozens of thousands of early deaths per year in Europe, and Germany has 6 of the top 10 worst offending plants. Until they fix that (not anytime soon), it's not a country that should be hosting foreign workloads on top of their national needs.
Hetzner seem to have a DC in Finland, which can only be better. Not sure if prices are competitive.
Scaleway and OVH are good alternatives if you want to host in Western Europe.