ping

Where are you located?

All servers are located in central europe, If you're located far away from europe then that's most likely why you have high ping. Especially when a lot of users in your country uses the internet at the same time. Your internet provider will most likely send traffic to europe via a different route/road than someone with a different internet provider will, even in the same country. One can be congested, much like a traffic jam, causing every packet of data to move slower. There is not really a fix for this, except complaining to your internet provider, or switching internet provider.

You can document it by using a traceroute. Read this article for instructions on how to do that:
https://support.aternos.org/hc/en-us/articles/360027235671