仅能加载谷歌网页，SurfShark VPN安装失败并卸载异常求助

大家好，我现在碰到了两个棘手的问题：一是网络只能打开谷歌网页，其他网站都没法正常访问；二是SurfShark VPN安装后没法用，卸载的时候还出了异常，想请各位帮忙支支招。

我先是照着SurfShark官网的指引，运行了以下命令安装VPN：

curl -f https://downloads.surfshark.com/linux/debian-install.sh --output surfshark-install.sh #gets the installation script
cat surfshark-install.sh #shows script's content
sh surfshark-install.sh #installs surfshark

结果安装完之后，我发现任何列出的VPN节点都连接不上，于是联系了SurfShark客服，按照他们给的命令尝试卸载：

sudo apt purge surfshark # deletes surfshark GUI and its dependencies
sudo apt purge surfshark-vpn # deletes CLI dependencies, in case the CLI tool is installed
sudo apt purge surfshark-release # deletes our repository package

可执行卸载命令时，我收到了如下错误信息：

vance@vance-VP4650:~$ sudo apt purge surfshark
[sudo] password for vance:
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
The following packages will be REMOVED:...

现在网络状态异常，VPN卸载也不顺畅，麻烦各位帮我分析下问题出在哪，该怎么解决？

备注：内容来源于stack exchange，提问作者2Fry