Minecraft constantly timeouts. How do I solve this?

I currently have the problem that Minecraft is constantly being thrown out of the online session. Incidentally, I did not have this problem before. In all other imaginable online games that I had so far everything runs fine.

I have already informed and seen that I have a port release at FRITZ! Box must create. I have done this with several attempts - without success. Also, I have released the port 25565 in the Windows Firewall - again without success. Now, after weeks of searching the Internet, I have found no solution and turn to this portal.

Please can someone help me properly.

Also, answers like: buy good internet, or similar. To refrain, because they do not help anyone.

Maybe your Internet connection on the PC, so Lan or WLAN, has a loose connection or your Internet provider has changed something. For me there were always short failures.

Ansonnsten may also be due to a software problem, which I do not know.

This may be due to the server (hangs and answers no longer = timeout, but then all fly out), but synonymous s.der connection to your hardware that is not. Sometimes nodes on the Internet are overloaded, depending on how your connection to the server is routed, one thing and the other does not work.
A VPN server could help, but it is not said that doing so is more or less gambling, depending on how your connection is routed.

I could try that with the VPN. It's definitely not on the server because my friend stays in the game (GommeHD.net, Rewinside.tv, and other big servers). By the way, while I have the timeout I can still talk, so discord and teamspeak work fine.