Well, it's the worst ISP in China.They shape everything.I suggest you should switch to other ISP such as China Telecom , China Unicom or China Mobile.You may find some cheap plans on the RedNote.But BE CAREFUL.
If you switch your ISP to I mentioned above, you could try these servers.
China Telecom: NL , DE , US SJC , US LAX
China Unicom: nearly all european servers (except IE , NO , SE) (I recommend NL , DE) , US servers in the west coast.
China Mobile: JP , SG servers
I recommend using OpenVPN (IP Entry 3 & UDP & Port 443),since WireGuard is too easy to be identified (run a Wireshark and you know what I mean).
If you have IPv6 connection,you should use them first (unless it's too slow for you).The GFW is less aggressive on IPv6 compared to IPv4