Your Full VPN exception list covers almost all IPv4 addresses, so the game may bypass Mudfish. Clear Setup → Program → Full VPN → Exception routes, save, reconnect, then test with a Singapore node showing ~80 ms (e.g. RansomIT or LightNode 2). If Full VPN reaches ~80 ms but the game item remains ~200 ms, please upload a capture made while playing in Full VPN: Packet Capture.
Glad to hear Full VPN now gives you ~90 ms. This confirms the Singapore route works; the Marvel Rivals item likely misses some current game-server traffic. We can investigate an update, but cannot promise a schedule before analyzing it. Please capture and upload a few minutes of an actual match with Full VPN enabled: Packet Capture. Until then, please keep using Full VPN.