Game Feel Extreamly Laggy Even In Good Network Environment

I'm playing Chinese version POE2, we have Tencent Server, and F1 told me my network latency is 30ms

but game still feel very laggy, character takes very long time to response to my input.
I think the gap is about 500ms.

so single player, 30ms latency, why game feels so laggy?



Did GGG programmers know "Rollback Netcode" system? I think it would be helpful.