This is the most technical step.
Check the Event Viewer:
Remember: With great power comes great responsibility. Use V2Ray Core responsibly, respect local laws, and prioritize the security of your endpoints. v2ray core windows
Check if you are using mKCP on a high-speed connection. Switch to TCP + TLS. Also, reduce log level from debug to warning . This is the most technical step
Or use a linter like jq or an online JSON validator. respect local laws