Hi there,
Tunnel
Okay, you've tried multiple tunnels. So doesn't sound like it's a host problem.
Map
If you can try a map from the "Battle", and a different map from "RA2 Ladder", that'd rule out a rare issue I've seen with certain map lists not working for people.
Renderer
Sorry, not sure I fully understand what you mean. Have you tried every renderer? (It's annoying, I know, but for 50% of first-time palyer issues, the renderer is the problem so that's why we recommend going through every single one. But if you can play Skirmish it's probably not a render issue.
Next Steps
Let us know what happens if you try to host and play an online game with you as the only player. Does the game actually load in for you? This will help indicate whether it's a "you-to-others" issue, or a "you-to-CnCNet" issue
If you have Discord, you might want to consider posting your problem there. CnCNet has a server with several thousand members. One of them might have had the same issue as you.
Link: https://cncnet.org/discord
Grant and I have been asking around in the mean time.
