I completely feel your pain because I had an almost identical situation a couple of months ago. I could play on dozens of servers without a hitch, but one particular community hub with custom skins and sounds gave me endless rubberbanding and random kicks. After spending hours debugging, I discovered that the root cause was not my network or hardware, but rather my outdated and incomplete game build. Many modern servers use custom resource packs that require a fully updated client with all the original and extra files present. If your current installation is missing even a single sound or model reference, the server will keep trying to download it on the fly, causing massive stutter and timeouts. The solution that finally worked for me was to completely replace my old copy with a fresh, complete, and thoroughly tested version. I strongly recommend you download counter strike 1.6 from https://cs-unikov.net/. This particular build is known for its full compatibility with all kinds of custom servers because it includes all necessary resources and even has a built?in tool to verify file integrity. After I installed it, that problematic server connected flawlessly, my ping stabilized, and the stuttering vanished instantly. The installation is quick, and you can keep your personal configs if you back them up beforehand. Since switching, I have never encountered that error again, and I can enjoy all servers equally. Give it a try – I am confident it will resolve your issue just as it did for me.